A chemical substance is any material with a known chemical composition. For example, water has the same properties and the same ratio of hydrogen to oxygen...

Chemical warfare means using poisonous chemical compounds to injure or kill people in a war. Chemical warfare has been used since the Stone Age[verification...

A chemical compound is a substance made of two or more different elements joined together by chemical bonds in a fixed ratio. Many compounds are made...

A chemical reaction happens when one or more chemicals are changed into one or more other chemicals. Some examples are: iron and oxygen combining to make...

A chemical element is a substance that is made up of only one type of atom. Atoms are made up of protons, neutrons, and electrons. The number of protons...

A chemical bond is a type of attraction force which holds together different chemical species. Atoms bonded stay together unless the needed amount of...

A chemical formula is a way that chemists describe a molecule. The formula says what atoms, and how many of each type, are in the molecule. Sometimes the...

Chemical engineering is a branch of engineering dealing with chemistry that came to existence in the early 20th century. Before this time, chemical plants...

A chemical change (chemical reaction) is a change of materials into other materials with different properties. Chemical changes occur when a substance...

A chemical equation is a way to predict the way that two or more chemicals will work together. Using what chemists know about the way chemicals act, we...

Chemical nomenclature is the system scientists use to name chemicals in a clear and organized way. It helps chemists talk about substances without confusion...

aspect of a substance which is only seen by means of a chemical reaction. Simply speaking, chemical properties cannot be determined just by viewing or touching...

Chemical composition is the arrangement, type, and ratio of atoms in molecules of chemical substances. Chemical composition varies when chemicals are...

Prohibition of Chemical Weapons (OPCW) is an international organisation made in 1997 in order to watch countries according to Chemical Weapons Convention...

A chemical symbol is the shortform of the name of an element. Usually, it is made up of one or two letters, but sometimes it is made up of three letters...

Chemical synapses are synapses that use chemical messengers called neurotransmitters to transmit signals. They are found all over the body. Especially...

Chemical purification or chemical isolation is the process in chemistry where one chemical substance is separated from other substance so that it is pure...

chemistry, chemical synthesis means using chemical reactions to get a product, or several products. This happens by physical and chemical manipulations...

Chemical vapor deposition is a method of putting a thin layer of materials on to a surface using very low heat. It is specially useful for coating thin...

Chemical biology is a science that combines the fields of chemistry and biology. It involves the application of chemical techniques and tools, often compounds...

shows the history of the chemical elements. As of September 2025, people have discovered or made 118 different elements. Chemical compounds of these elements...

Chemical stability refers to the resistance of a chemical to change in a chemical reaction. Some chemicals, like gold, are very stable and resistant to...

My Chemical Romance (often abbreviated to MCR or shortened to My Chem) is a rock band from New Jersey that began in 2001. They released their first album...

Chemical kinetics, also called reaction kinetics, is the branch of physical chemistry connected with study of how fast chemical reactions go. This includes...

A chemical species is one of a group of atoms, molecules, molecular fragments, ions, etc., made to go through to a chemical process or to a measurement...

Chemical precipitation is the making of a solid from a solution by a chemical reaction. When two or more solutions are mixed together and make a product...

Chemical energy is the energy produced in a chemical reaction in the form of heat. Using Hess's law it is possible to calculate the amount of energy an...

Chemical Potential Energy is the energy stored up in substances due to their chemical bonds. It is energy that is stored in chemicals. One example of...

The List of data references for chemical elements is divided into datasheets that give values for many properties of the elements, together with various...

A chemical burn is a painful sensation caused by body tissue being destroyed. Various chemicals can create this type of burn. For example, concentrated...

A chemical database is a database specifically designed to store chemical information. This information is about chemical and crystal structures, spectra...

Calcium oxide is a chemical compound of calcium and oxygen. Its chemical formula is CaO. It is known as quicklime. It is made in a lime kiln. It releases...

Dow Chemical is a company which has its headquarters in the United States. It is the second-largest producer of chemicals in the world, after BASF. This...

The Chemical Weapons Convention (CWC) is an arms control agreement which prohibits chemical weapons and chemical warfare. It is forbidden to make, store...

Chemical similarity or molecular similarity is a similarity between two different molecules. Two molecules with chemical similarity may do the same or...

A chemical transport reaction is a type of chemical process. It is used to purify chemicals and grow crystals. Chemical transport reactions work by converting...

The Chemical Brothers are a British electronica duo based in Manchester. They have released nine albums, five of which reached number one on the UK album...

electronica duo The Chemical Brothers. "Push The Button by The Chemical Brothers" – via www.metacritic.com. John Bush. "Push the Button - The Chemical Brothers"...

A chemical cell converts chemical energy into electrical energy. Most batteries are chemical cells. A chemical reaction takes place inside the battery...

Dynamic equilibrium applies to dynamics. Chemical equilibrium is an idea which describes the behavior of chemical reactions over time. In reactions that...

chemical industry changes raw materials (oil, natural gas, air, water, metals, and minerals) into more than 70,000 different products. Some chemical companies...

self-identified group of chemical educators (faculty members and instructors who focus on teaching rather than focus on chemical research). Dr. Robert L...

Reactivity involves both the thermodynamics and kinetics of the particular chemical reaction. A reaction will be more reactive if the total energy of the products...

The American Chemical Society (ACS) is a scientific society based in the United States that supports scientific inquiry in the field of chemistry. Founded...

described by Gary Epler in 1985. Chemical pneumonia Chemical pneumonia (usually called chemical pneumonitis) is caused by chemical toxins such as pesticides...

A chemical relaxer is used to straighten hair or loosen tight curls by use of chemicals to break the disulphide bonds the hair. It may have side effects...

A CAS registry number is a unique number given to every chemical substance by the Chemical Abstracts Service (CAS). It is also called CASRN or CAS number...

"Out of Control" is a 1999 song by The Chemical Brothers and is the third single from their third studio album Surrender. It went to number 21 in the United...

population and mass killings; al-Majid was dubbed "Chemical Ali" by Iraqi Kurds for his use of chemical weapons in attacks against them. Al-Majid was captured...

Lanthanum is a chemical element. It has the chemical symbol La. It has the atomic number 57. It is part of a group of chemical elements in the periodic...

The periodic table is a table that puts all known chemical elements in a specific order. Elements that have similar characteristics are often put near...

In chemistry, the term inert is used to describe something that is not chemically active. The noble gases were described as being inert because they did...

study compounds, and find new ways to do chemical reactions, or do old chemical reactions. They make chemicals in order to find new ways to do things....

Nanjing Shanghai On 21 March 2019, an explosion occurred at a chemical plant in Chenjiagang Chemical Industry Park, Chenjiagang [zh], Xiangshui County, Yancheng...

precursor is a chemical compound that is used to make another chemical compound. Precursors can be the reactants in a single chemical reaction, or the...

Unbioctium also called eka-curium is a chemical element that has been not been yet discovered. It has isotopes but how many isotopes it has in still yet...

to Oregon Agricultural College and graduated in 1922 with a degree in chemical engineering. Pauling then went to the California Institute of Technology...

Surrender is the third studio album by English electronic duo The Chemical Brothers. It was released on 21 June 1999 through Virgin Records. It topped...

agent is a chemical that gives away electrons to another chemical compound. A chemical gaining electrons is called reduction. A chemical that gains electrons...

Strontium is a chemical element. It has the chemical symbol Sr. It has the atomic number 38. It is a metal. The color of the metal is silver-white or...

Ytterbium is a chemical element. It has the chemical symbol Yb. It has the atomic number 70 which means it has 70 protons in an atom. It is part of a...

square-shaped sign or picture that tells people about the hazards of a chemical compound. It was designed in 1960 by the National Fire Protection Association...

REACH is an EU directive that simplifies the laws regarding the use of chemical substances inside the European Union. It was made law in 2007. The name...

Gadolinium is a chemical element. It has the chemical symbol Gd. It has the atomic number 64. It is part of a group of chemical elements in the periodic...

a random aggregate of minerals and/or mineraloids, and has no specific chemical composition. Most of the rocks of the Earth's crust have quartz (crystalline...

Chlorine (chemical symbol Cl) is a chemical element. Its atomic number (which is the number of protons in it) is 17, and its atomic mass is 35.45. It...

Californium is a chemical element. It is a radioactive metal. It has the chemical symbol Cf. It has the atomic number 98. Californium is a transuranium...

A carbonate is a chemical compound that has the carbonate ion, CO2− 3. This ion is made of carbon and oxygen. The name may also mean an ester of carbonic...

Chemical laws are the natural, unbreakable laws used in chemistry. The basic idea in chemistry is the law of conservation of mass. This short article about...

The Psycho-Social, Chemical, Biological & Electro-Magnetic Manipulation of Human Consciousness is the first studio album by American underground hip hop...

Ruthenium is a chemical element. It has the chemical symbol Ru. It has the atomic number 44. It is a rare metal. It is silver white. In chemistry it is...

This concept is used to calculate how much chemicals are needed in a chemical reaction if no reactants (chemicals that are reacted) should be left. If too...

In World War I, chemical weapons were used often. They were a major part of the war. This was the first time in history that chemical weapons were widely...

Lutetium is a chemical element. It has the chemical symbol Lu. It has the atomic number 71. It is a metal and a rare earth element. It is silver white...

Cobalt (chemical symbol Co) is a chemical element. It has an atomic number of 27 and an atomic mass of about 59. It is a metal. Cobalt is a transition...

grain alcohol or just alcohol, is a flammable, colorless chemical compound whose chemical formula is C2H5OH, also written as C2H6O. It is the active...

Boron is a chemical element. It has the chemical symbol B. It has the atomic number 5. It is a metalloid (it has properties of a metal and a non-metal)...

Selenium is a chemical element. Its chemical symbol is Se and its atomic number is 34. It has 34 protons and 34 electrons and a mass number of 78.96. Selenium...

The Powerpuff Girls: Chemical X-Traction is a 2001 video game based on The Powerpuff Girls. It was released for the Nintendo 64 and PlayStation. The player...

and their vapors are poison gas. "Poison gas" can refer to poisons in chemical weapons, but most of them are in fact liquids, for example mustard gas...

Rhodium is a chemical element. It has the chemical symbol Rh. It has the atomic number 45. It is a rare metal. It is silver white and hard. In chemistry...

Palladium is a chemical element. It has the chemical symbol Pd. It has the atomic number 46. It is a noble metal. It is silver white. In chemistry it...

Indium is a chemical element. It has the chemical symbol In. It has the atomic number 49. It is a rare metal which is soft, malleable, and poor (post-transition)...

"Believe" is a song by English electronica duo The Chemical Brothers. The song was on the album Push the Button. The single released in early May 2005...

make sure products are safe, and in food testing to check for harmful chemicals. Analytical chemistry is usually split into two main parts. Qualitative...

or Medicine, along with Henry Hallett Dale, for their discoveries about chemical transmission of nerve impulses In his most famous experiment, Loewi took...

Germanium is a chemical element. Its chemical symbol is Ge. Its atomic number is 32. It was discovered by Clemens Winkler. It is a shiny, hard, silver-white...

Tantalum is a chemical element. Tantalum was named tantalium. It has the chemical symbol Ta. It has the atomic number 73. It is a rare metal. It is hard...

Calcium carbonate is a chemical compound made of calcium and carbonate ions, with the chemical formula CaCO3. The elements involved are calcium (Ca),...

Zirconium is a chemical elemental metal. It is a greyish-white in color. It is atomic number 40 on the periodic table. Its symbol is Zr. And it is in the...

manganese(IV) oxide, is a chemical compound of manganese and oxygen. It contains manganese in the +4 oxidation state. Its chemical formula is MnO2. It is...

Hydrogen sulfide (British English: hydrogen sulphide) is the chemical compound with the formula H 2S, is a colorless, toxic, flammable gas that is responsible...

Ununennium, or element 119, is a predicted chemical element. Its symbol is Uue. Ununennium and Uue are substitute names made by the IUPAC, (meaning "one-one-nine-ium"...

Yttrium is a chemical elemental metal with an atomic number of 39, a chemical symbol of Y, and an atomic weight of 88.905(abridged). It is classified as...

Mustard gas or sulfur mustard is a chemical compound which has been used as a chemical weapon. It was used in World War I by the German Army against British...

Electronegativity, symbol χ, is a chemical property that says how well an atom can attract electrons towards itself. The electronegativity of an atom is...

Bachelor of Fine Arts degree in 1999. "My Chemical Romance". My Chemical Romance. Retrieved February 7, 2015. "My Chemical Romance reunion". nypost.com. Retrieved...

Carbon monoxide, with the chemical formula CO, is a colorless, odorless, and tasteless gas. It consists of one carbon atom covalently bonded to one oxygen...

Curium is a synthetic chemical element in the periodic table that has the atomic number 96. It has the chemical symbol Cm and it is a radioactive metal...

happens to some chemical elements. Most chemical elements are stable. Stable elements are made up of atoms that stay the same. Even in a chemical reaction,...

very far. They investigated this further, and discovered that certain chemical elements, like the hydrogen and helium that make up the Sun, absorbed certain...

Moscovium is a superheavy synthetic radioactive chemical element also known as eka-bismuth. It has the symbol Mc and the atomic number 115. Moscovium does...

Phosgene is the chemical compound with the formula COCl2. Phosgene gas is colorless and was used as a weapon during World War I. It caused most of the...

can have two meanings. It can be a chemical that releases oxygen atoms. For example, potassium chlorate has a chemical formula of KClO3. When it oxidizes...

and supernovae. People make explosions mostly by using chemical explosive materials. A chemical explosion starts pressure waves in the medium where it...

carbonate, baking soda, bicarb, or bicarbonate of soda is a chemical compound with the chemical formula NaHCO3. The elements within it are sodium, hydrogen...

The National High School of Chemical and Technological Engineers (French: École nationale supérieure des ingénieurs en arts chimiques et technologiques)...

Einsteinium is a chemical element with the atomic number 99 it is a synthetic element, so all isotopes are radioactive. Einsteinium is the 7th element...

Molybdenum is a chemical element. It has the chemical symbol Mo. It has the atomic number 42. It has 35 isotopes. The name Molybdenum is from the Greek...

Unbihexium, also known as element 126 or eka-plutonium, is the possible chemical element with atomic number 126 and placeholder symbol Ubh. Unbihexium and...

Carbon dioxide (CO2) is a chemical compound and is acidic. It is a gas at room temperature. It is made of one carbon and two oxygen atoms. People and most...

a definition for: plutonium. Plutonium is the chemical element with the atomic number 94 and chemical symbol Pu. It is a highly radioactive metal, and...

Metabolism is the chemical reactions which keep us alive. It happens in the cells of living organisms. The chemical reactions are catalyzed by enzymes...

An acid is a type of chemical compound. The definition of an acid has changed as people discovered more about chemistry. Acids were originally grouped...

Darmstadtium is a chemical element. It has been named ununnilium (Uun) or eka-platinum but is now named darmstadtium. It has the symbol Ds. It has the...

Hydrofluoric acid (HF) is a solution of hydrogen fluoride in water. Its chemical formula is HF. It is a very dangerous acid, being very corrosive and extremely...

Technetium is a radioactive chemical element that has the chemical symbol Tc and has the atomic number 43. It is the lightest synthetic element. The color...

Chemistry in 1901. van 't Hoff studied the active principles of chemical kinetics, chemical equilibrium, osmotic pressure, and stereochemistry. Wikiquote...

process of change in rate (speed) of a chemical reaction due to the help of a catalyst. Unlike other chemicals which take part in the reaction, a catalyst...

Francium is a chemical element with the chemical symbol Fr and an atomic number of 87. It is a metal. In chemistry it is placed in a group of metal elements...

Tin(II) oxide, also known as stannous oxide, is a chemical compound. Its chemical formula is SnO. It has tin in an oxidation state of +2. It also has...

(32° Fahrenheit, 273.15 Kelvin). The chemical element with the highest melting point is tungsten. Some chemical compounds have a higher melting point...

Unbiquadium, also known as element 124 or eka-uranium, is the possible chemical element with atomic number 124 and placeholder symbol Ubq. Unbiquadium...

Biochemistry is the study of chemical reactions in living beings, and of biological molecules in general. It is important to cell biology and physiology...

in a chemical reaction. Thus, the amount of matter cannot change. Sir Antoine Lavoisier promoted this idea. This law says that when a chemical reaction...

Hafnium is a chemical element. It has the chemical symbol Hf. It has the atomic number 72. It is a metal. It is silver gray. In chemistry it is placed...

are homopolymer nylon, made from a single chemical, and heteropolymer nylon, made from more than one chemical. Nylons are numbered based on the number...

Antimony is a chemical element. It has the chemical symbol Sb. The symbol Sb is from the Latin word stibium, meaning stibnite. It has the atomic number...

Hydrochloric acid is a chemical compound. It is a solution of hydrogen chloride (HCl) gas that is dissolved in water. In the past, people called it muriatic...

is an American musician. He is the bass guitarist for the punk band; My Chemical Romance. Way is the younger brother of the band's singer, Gerard Way. He's...

state (or oxidation number) of an element is used to predict what sort of chemical compounds form. Every element has oxidation states that it likes, and will...

Acetylcholine is a chemical in human nerves that carries information (called neurotransmitter) from the sense of touch, sense of smell, etc. This chemical is produced...

Livermorium is a radioactive chemical element that has the chemical symbol Lv and the atomic number 116. Its longest half-life lasts only 47 milliseconds...

number increases) Redox (shorthand for reduction/oxidation) describes all chemical reactions in which atoms have an increase or decrease in oxidation number...

Thulium (pronounced /ˈθjuːliəm/) is a chemical element that has the symbol Tm and atomic number 69. It is a lanthanide element. Periodic table List of...

arranged in a crystalline material. Crystals occur naturally from the way the chemical bonds of the atoms connect. Symmetric repeating patterns occur in 3-D space...

Samarium is a chemical element that has the symbol Sm on the periodic table. It has the atomic number 62 which means it has 62 protons in an atom. This...

steroid hormones are made by changing the basic chemical structure of cholesterol. This is an example of chemical synthesis. Hypercholesterolemia means that...

is the study of chemical compounds that contain carbon. Carbon has the ability to form a chemical bond with a wide variety of chemical elements and other...

or food, or absorbed through the skin. The damage is usually done by a chemical reaction. The effect of the poison varies with the amount which is absorbed...

Sodium is a chemical element with an atomic number of 11. Its symbol is Na (from its Latin name natrium). It is an alkali metal. Although sodium has many...

Barium is chemical element 56 on the periodic table. Its symbol is Ba. It contains 56 protons and 56 electrons. Its mass number is about 137.3. It is a...

Tellurium is a chemical element. It has the chemical symbol Te and the atomic number 52. It has 52 protons and 52 electrons. Its mass number is 127.6...

Sulfur (American English) or sulphur (British English) is a chemical element. The symbol for sulfur is S, and its atomic number is 16. Old English name...

the final result of a chemical reaction. The reaction changes reactants into products. In more complex processes in the chemical industry, "product" usually...

hits the body (like punching someone or falling from a tree) Chemical – being hurt by chemicals like burns from acid Injury can be accidental or intentional...

MSDS, is a document for a chemical compound. It explains the hazards of the chemical and gives an overview of the chemical's properties. This short article...

shone through a solid, liquid, or gas. To be analysed the chemical is heated, because each chemical glows differently. The various wavelengths of the glow...

Tungsten (sometimes named wolfram) is a chemical element on the periodic table. It has the chemical symbol W and it has the atomic number 74. It is a...

Vanadium is chemical element 23 on the periodic table. Its symbol is V. It is a metal and is part of the group known as the transition metals. It is gray-blue...

Sodium carbonate is a chemical compound. It is composed of sodium and carbonate ions. Its chemical formula is Na2CO3. It is a base. It reacts with acids...

Physical chemistry uses physics to study chemical systems. It studies them at macroscopic, atomic, subatomic, and particulate levels. It looks at concepts...

Rutherfordium is a chemical element. It has also been named eka-hafnium and unnilquadium. It has the symbol Rf and has the atomic number 104. It is a very...

to the diatomic anion OH−, made up of oxygen and hydrogen atoms. Most chemical compounds that contain hydroxides are bases. An Arrhenius base is a substance...

molecule in cells which works as a biological catalyst. Enzymes speed up chemical reactions but do not get used while doing so, so they can be used over...

Green chemistry (or sustainable chemistry) is a type of chemical research and engineering. It supports the design of products and processes that use as...

A battery converts chemical energy into electrical energy by a chemical reaction. Usually the chemicals are kept inside the battery. It is used in a circuit...

A polycyclic compound is a chemical compound that has more than one ring of atoms in the structure of the molecule. Formally, a compound is not called...

about the chemical concept of valence, or valency. Other meanings are at valence. In chemistry, valency or valence is the number of chemical bonds that...

invented femtochemistry and won the Nobel Prize in Chemistry for 1999. Chemical reactions were once thought impossible to measure, because they happen...

works. It could mean: Plural of drug - a chemical substance that has an effect on the body Illegal drugs - Chemicals, pills, liquids, or parts of plants that...

Acetone, or propanone, is an organic compound with the chemical formula (CH3)2CO. This clear, mobile, easy-to-burn liquid is the simplest example of the...

Osmium is a chemical element. It is element number 76 on the periodic table. Its symbol is Os. There is not much osmium on earth. There is actually such...

Neurotransmitters are chemical messengers. They send information between neurons by crossing a synapse. Electrical signals are not able to cross the gap...

A reagent is a chemical used to test for other chemicals. For example, potassium dichromate is used to test for alcohol, and nitric acid can be used to...

Hydrogen iodide (HI) is a chemical compound. Its chemical formula is HI. It is a colorless odorous gas. It reacts with oxygen to make iodine and water...

Copernicium (formerly Ununbium) is a chemical element in the Periodic Table. It is also named eka-mercury. It has the symbol Cn. It has the atomic number...

The four simple chemical reactions are categories of chemical reaction used in chemistry education. They group reactions with one or two reactants or...

Oganesson is a synthetic chemical element with symbol Og and atomic number 118. Oganesson has the highest atomic number and highest atomic mass of all...

Cerium is a chemical element with an atomic number of 58. This means that the nucleus of cerium has 58 protons in it. The atomic mass of cerium is 140...

Nitrogen is a nonmetal chemical element. The atmosphere contains more than 78 percent of nitrogen. It has the chemical symbol N and atomic number 7. Its...

Scandium is chemical element. Its symbol is Sc. It has an atomic number of 21 on the periodic table. Scandium is a metal in a group known as the transition...

splashes of chemicals or explosions that could harm them. Most chemical reactions are done inside a fume hood. University of Louisville's Chemical Hood User's...

in a group A thing that a set holds Chemical element, a substance that can not be divided into smaller chemical parts A book by Euclid called the Elements...

Sulfur dioxide (also sulphur dioxide) is the chemical compound with the formula SO2. It is a gas. It smells like burnt matches or rotten eggs. It can also...

Platinum is a chemical element. It has symbol Pt and atomic number 78. Platinum is a soft, heavy, white metal. It is a precious metal and a transition...

glass, made of porcelain or non-reactive metal. Crucibles are used to heat chemical compounds to very high temperatures. Metals such as nickel and zirconium...

selenium(I) chloride or diselenium dichloride, is a chemical compound made of selenium and chlorine. Its chemical formula is Se2Cl2. It is a reddish brown oily...

solve chemical problems. These programs help scientists learn about molecules and solids. Computational chemistry is often used with chemical experiments...

the name for a number of chemical compounds. They are not actually gases. They are fine powders or mists of liquid. The chemicals are acidic and cause pain...

Silicon dioxide, also known as silica, is a chemical compound, the oxide of silicon. Its chemical symbol is SiO2. It is known for its hardness since the...

has a definition for: lead. Lead (pronunciation: /'lɛd/) is a chemical element. Its chemical symbol is Pb, which comes from plumbum, the Latin word for lead...

Polonium is a rare radioactive metalloid. It is chemical element 84 on the periodic table and its symbol is Po. It was discovered in 1898 by Marie and...

Common forms of energy used in engines are chemical energy (such as petrol or diesel), or heat. When a chemical is used to produce energy it is known as...

An electrical cell is a device used to generate electricity, or to make chemical reactions by applying electricity. A battery is one or more cells, connected...

Carbon is a very important chemical element, with a chemical symbol of C. All known life on Earth needs it to survive. Carbon has atomic mass 12 and atomic...

life is the idea that before life began there must have been a process of chemical change. Another question which has been discussed by J.D. Bernal and others...

laboratory equipment used to see any biological, chemical or physical change in samples of chemicals in microtiter plates. Most of the time, a very bright...

A metalloid is a type of chemical element. Metalloids are elements that have the properties of both metal and non-metal elements. It might be shiny, but...

Unbibium, also known as Element 122 or eka-thorium, is the possible chemical element in the periodic table with the placeholder symbol of Ubb and atomic...

Nickel (chemical symbol Ni) is an element. It has an atomic number of 28 and an atomic mass of about 58.69amu. It has 28 protons. It is a transition metal...

Organic synthesis is a special part of chemical synthesis. It builds organic compounds using organic reactions. Organic molecules can have a higher level...

Niobium is a chemical element. It is sometimes named columbium. It has the chemical symbol Nb. It has the atomic number 41. It is a rare metal. Niobium...

pronounce the Latin name of an animal. Chemical compounds can also have common names. The systematic name of a chemical is usually defined by the International...

chloride and cobalt dichloride, is a chemical compound. It contains cobalt in its +2 oxidation state. Its chemical formula is CoCl2. It contains cobalt...

Wet chemistry studies chemical reactions that occur in the liquid phase. It is also called bench chemistry because many of the tests performed are done...

Sodium phosphate is a group of chemical compounds made from sodium and phosphoric acid. As a triprotic acid, phosphoric acid has three hydrogen atoms that...

Halogen derivatives of polyacetylene, (CH) x". Journal of the Chemical Society, Chemical Communications (16): 578. doi:10.1039/C39770000578. Archived from...

determine how it reacts with other chemicals. Having specific functional groups is what defines a family of organic chemicals. Functional groups are usually...

Hydrolysis is a chemical reaction or process where a chemical compound reacts with water. This is the type of reaction that is used to break down polymers...

26 neutrons. Titanium was discovered in 1791 by William Gregor. It is chemical element number 22 on the periodic table. Its symbol is Ti. It has 22 electrons...

Priestley Medalist K. Barry Sharpless works magic in the world of molecules". Chemical & Engineering News. Retrieved 2019-04-08. This short article about a person from...

Ammonia is a chemical compound made from nitrogen and hydrogen atoms. It has the chemical formula NH3. Ammonia is a weak base, and reacts with strong acids...

Holmium (pronounced /ˈhoʊlmiəm/) is a chemical element with the symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a relatively...

a chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be seen. The pH indicator is a chemical detector...

Bohrium is a chemical element. At the periodic table of the elements it is at position 107. The element is named in honor of Niels Bohr. Mendeleev predicted...

Tricalcium phosphate, a chemical compound with the chemical formula of Ca3(PO4)2 Dicalcium phosphate, a chemical compound with the chemical formula of CaHPO4...

A nutrient is either a chemical element or compound used in an organism's metabolism or physiology. A nutrient is essential to an organism if it cannot...

chemical formula -COCH3. The acetyl group contains a methyl group bonded to a carbonyl with a lone electron left over. This electron forms a chemical...

Cadmium sulfate is a chemical compound. Its chemical formula is CdSO4. It is made of cadmium and sulfate ions. The cadmium is in its +2 oxidation state...

planet is probably better known than the real chemical element called Krypton. It took until 1962 until a chemical compound containing Krypton was found. List...

elements undiscovered at the time) were later proved correct by experiments. Chemical element 101 was named Mendelevium in his honor. Mendeleev was born in the...

Caesium (or cesium) is the chemical element with the atomic number 55 on the periodic table. Its symbol is Cs. Caesium is an alkali metal. Its melting...

Roald Hoffmann. Fukui and Hoffmann worked separately on the mechanisms of chemical reactions. Fukui explained in his Nobel lecture that, "It is only after...

Rubidium is chemical element 37 on the periodic table. Its symbol is Rb. Its atomic mass is 85.47. It has 37 protons and 37 electrons. It is a soft silver...

physical weathering is when the rocks and minerals are broken down but the chemical composition remains the same. Mechanical weathering physically breaks up...

Terbium is a chemical element that has the symbol Tb on the periodic table. It has the atomic number 65 which means it has 65 protons in an atom. Its compounds...

also feel for friends, such as platonic love, or family. There are also chemical reactions within the brain that can be triggered by the different types...

also known as nitrogen monoxide is a chemical compound made of one nitrogen and one oxygen atom. It has the chemical formula ·NO, where the · is an unpaired...

Scientists are trying to make new chemical elements that do not exist yet. In this way, they will extend the periodic table, or make it longer. As of 2026...

Sulfuric acid, also known as sulphuric acid, is a chemical compound and strong acid. The chemical formula is H2SO4. Salts of sulfuric acid are called...

Many phosphates do not dissolve in water. "Phosphates – PubChem Public Chemical Database". The PubChem Project. USA: National Center of Biotechnology Information...

plants, such as trees and bushes, are green. This is because there is a chemical in leaves, called chlorophyll, which is colored green. See color vision...

became involved with I.G. Farben, a chemical company he founded. At that time, I.G. Farben was the biggest chemical company in the world. In 1931, Bosch...

A pesticide is a chemical that is used to kill or prevent small animals (or organisms) which are considered to be unwanted. These organisms are called...

individual countries. It governs everything to do with chemicals, elements and new discoveries. Every chemical known has a common name and a IUPAC name. This...

Methane is an organic compound with the chemical formula CH 4. It is an alkane with one carbon atom. It is often found as the main part of natural gas...

molecular input line entry specification or SMILES is a line notation for the chemical structure of molecules. It uses short series ASCII characters to represent...

"emos". Examples of bands that emos have been known for listening to are My Chemical Romance, Green Day, Hawthorne Heights, Silverstein, AFI, Dashboard Confessional...

known as hydroselenic acid, selenium hydride, or selane, is a chemical compound. Its chemical formula is H2Se. It is an acid. It contains hydrogen and selenide...

Rhenium is a chemical element. It has the chemical symbol Re. It has the atomic number 75. It is a rare noble metal. It is silver white. In chemistry...

Nihonium (ニホニウム) is a chemical element. It is also named eka-thallium. It has the symbol Nh. It has the atomic number 113. It is a transuranium element...

the tool called iron, see ironing. Iron is a chemical element and a metal. It is the most common chemical element on Earth (by mass), and the most widely...

largest South Korean multi-industry company that produces electronics, chemicals, and telecommunications products and operates subsidiaries like LG Electronics...

Ethane is an organic chemical compound with chemical formula C2H6. At standard temperature and pressure, ethane is a colourless, odorless gas. It is isolated...

Roentgenium (pronounced /rɛntˈgɛniəm/, /rʌntˈdʒɛniəm/) is a chemical element. It is a transition metal. Its symbol is Rg, and its atomic number is 111...

Diethyl ether is a clear liquid chemical. It is often just called ether. Ether burns very easily and boils at about 35°C. It has a sweet smell and does...

This page shows a list of all 118 chemical elements that have been identified. Categories and subcategories in the metal–nonmetal range ^1 The element...

that could exist. There are over 100 different kinds of atoms, called chemical elements. Each kind has the same basic structure, but a different number...

Europium is a chemical element. It has the symbol Eu on the periodic table. It has an atomic number 63 which means it has 63 protons in one atom. It was...

Baking powder is a dry chemical leavening agent used to make baked foods lighter and less dense. It was invented by the English chemist Alfred Bird (1811–1878)...

Thallium is at chemical element, it has symbol Tl and atomic number 81. Its standard atomic weight is 204.4. It is found in Group 15 of the periodic table...

dissolves in water (which splits into an acetate anion and a hydron). The chemical formula is CH3COO− (also written as CH3CO−2 or C2H3O−2) when it exists...

Tin is a chemical element with symbol Sn (for Latin: stannum) and atomic number 50. It is in Group 14 on the periodic table. It has ten isotopes that are...

Photodissociation, photolysis, or photodecomposition is a chemical reaction in which a chemical compound is broken down by photons. One or more photons...

A hypothetical compound is a chemical compound that has not been made or found by chemists. Hypothetical compounds can have their chemistry predicted by...

Aluminium arsenide is a chemical compound. Its chemical formula is AlAs. It has aluminium and arsenide ions in it. Aluminium arsenide is an orange solid...

are considered transition metals too. According to quantum mechanics, chemical evidence, and plenty of authors, Lutetium and Lawrencium should be transition...

different chemicals. It is the opposite of symproportionation, which is the giving of electrons from one atom to another atom, It makes one chemical from two...

Arsenic is chemical element 33 on the periodic table. Its symbol is As. Its atomic number is 33 and its atomic mass is 74.92. It is a toxic metalloid....

Xenon is a non-metal chemical element. It has the chemical symbol Xe and atomic number 54. As a noble gas, it is one of the few elements that are a gas...

of alkynylzinc reagents with alkenyl halides". Journal of the Chemical Society Chemical Communications (19): 683. doi:10.1039/C39770000683. "Press release...

Copper(II) chloride, also known as cupric chloride, is a chemical compound. Its chemical formula is CuCl2. It contains copper in its +2 oxidation state...

penicillin and how it could cure bacterial infections. Later he worked on the chemical structure of penicillin and other natural antibiotics. Chain was Jewish...

the coal reserves that were found nearby. After the Second World War, a chemical industry developed. The other pillar of the industry was a steel mill,...

odor or odour is a volatilized chemical compound, usually at a very low concentration, which humans and other animals perceive by the sense of olfaction...

common piece of laboratory equipment. It is commonly used for heating chemical substances, sterilization, and combustion. It works by burning flammable...

dvi-francium[source?] , eka-Ununennium, or element 173, is a possible chemical element which has never been seen in nature, and it has never been made...

Seaborgium is a chemical element. In the past, it has been named eka-tungsten but is now named seaborgium. It has the symbol Sg and it has the atomic number...

Reduction is a chemical reaction that involves the gaining of electrons by one of the atoms involved in the reaction between two chemicals. The term refers...

Actinium is chemical element 89 on the periodic table. Its symbol is Ac. Actinium's mass is 227 g/mol. Actinium is a silver radioactive, solid metal in...

Phosphine is a chemical compound. Its chemical name is phosphorus hydride. Its chemical formula is PH3. It is also called phosphane and phosphamine. It...

very unstable, but related chemicals with more rings are more stable. The name "dioxins" in common use means these chemicals, more accurately called dioxins...

Helium is a chemical element. It has the chemical symbol He, atomic number 2, and atomic weight of about 4.002602. There are 9 isotopes of helium, only...

many things including a re-fueling location for planes going overseas, a chemical weapons ammunition storage facility, and a test launch location for nuclear...

Then, some chemicals react. When one chemical floats through the air and reaches your eyes, they sting. There are ways to keep the chemical away. You can:　...

The chemical symbol is C2H2. 80% of all acetylene produced yearly in the United States is used for chemical synthesis. It is a toxic chemical; breathing...

Chromium is a chemical element. Its symbol on the periodic table (a list of all the elements) is Cr. It always has 24 protons, so its atomic number is...

Three Cheers for Sweet Revenge is the second studio album by band My Chemical Romance. It was released on June 8, 2004 through Reprise Records. Four singles...

Propane is an organic compound with the chemical formula C 3H 8. It is an alkane with three carbon atoms. It is used in fuels. It begins to burn very quickly...

Ethylene or ethene is a chemical compound with two carbon atoms and four hydrogen atoms in each molecule. These molecules are put together with a double...

Astatine is a radioactive, chemical element. Its atomic number is 85, and its atomic weight is 210. It is part of the Group 17 (halogens) on the periodic...

Battelle Memorial Institute; CAS, or Chemical Abstracts Service, the world's largest clearinghouse of chemical information; NetJets, the world's largest...

Silver (symbol Ag) is a chemical element. In chemistry, silver is element 47, a transition metal. It has an atomic weight of 107.86 a.m.u. Its symbol is...

Bismuth is a chemical element. It is element 83 on the periodic table and its symbol is Bi. Its atomic mass is 209. It is only slightly radioactive. The...

Paris green, which has the chemical name copper(II) acetoarsenite, is a chemical compound. Its chemical formula is Cu(C2H3O2)2 · 3 Cu(AsO2)2. It has copper...

Silicon is a chemical element. Its atomic number is 14 on the periodic table. Its symbol is Si. It is a hard, brittle crystalline solid. It is a tetravalent...

known as nitrogen tetroxide or dinitrogen tetraoxide, is a chemical compound. Its chemical formula is N2O4. It contains nitrogen in its +4 oxidation state...

Physiology or Medicine, along with Otto Loewi, for their discoveries about the chemical transmission of nerve impulses. "Biography of Henry Dale". The Nobel Foundation...

Barium chloride is a chemical substance. It is among the most important salts of barium. It is soluble in water. It is a poison. When it is heated, it...

Bromous acid is a chemical compound. It is an acid. Its chemical formula is HBrO2. It contains hydrogen and bromite ions. It contains bromine in its +3...

hydrotelluric acid, tellane, or tellurium hydride, is a chemical compound. It is also an acid. Its chemical formula is H2Te. It contains hydrogen and telluride...

is a chemical compound. It contains zinc and chloride ions. The zinc is in the +2 oxidation state, the only oxidation state zinc has. Its chemical formula...

for Interessen-Gemeinschaft Farbenindustrie AG), was a group of German chemical companies formed in 1925. Farben is German for "paints", "dyes", or "colors"...

'stone') is a soft, silver-white metal with symbol Li. It is the third chemical element in the periodic table. This means that it has 3 protons in its...

In general, people see the following as weapons of mass destruction: Chemical weapons, like poisonous gases and substances (e.g. nerve agents) Biological...

without changing them chemically. That means they help in mixing things at a molecular level but don't participate in any chemical change of the substance...

Meitnerium is a chemical element in the periodic table. Its atomic number is 109. It is not found on earth naturally. Because of this, it needs to be made...

Sarin (or GB) is a nerve gas, a deadly poison. It was developed as a chemical weapon for use in war by Nazi Germany. It is classified as a weapon of mass...

Promethium is a synthetic radioactive chemical element that has the symbol Pm on the periodic table. It has the atomic number 61 which means it has 61...

Potassium manganate is a chemical compound. Its chemical formula is K2MnO4. It contains potassium and manganate ions. Potassium manganate is a green solid...

study chemical structures. He learned out how to look at NMR data to find what atoms are connected together in a molecule. This is called "chemical shift"...

Aluminium antimonide is a chemical compound. Its chemical formula is AlSb. It has aluminium and antimonide ions in it. Compounds like it, such as gallium...

the University of Illinois at Urbana-Champaign and then worked for the chemical company DuPont for one year. He then went back to university to study for...

Esco Moerner (born June 24, 1953) is an American physical chemist and chemical physicist. He is known for his first optical detection and spectroscopy...

Protactinium is a very radioactive chemical element with the symbol Pa and atomic number 91. The density of this element is 231.04 Protactinium is a silver...

transition metals section. It is worth noting that darmstadtium has unknown chemical properties, but is probably a transition metal. This short article about...

aromatic compound, or arene, is a chemical compound that has a specific ring-like structure that gives it increased chemical stability. These compounds are...

food hormones and other chemicals are made by the stomach, liver, and pancreas. Muscle contraction happens because of chemical messages made by nerves...

chemical and biochemical phenomena that occur in natural places. It is the study of the sources, reactions, transport, effects, and fates of chemical...

transition metals section. It is worth noting that meitnerium has unknown chemical properties, but is probably a transition metal. This short article about...

Aluminium (in American English: aluminum) is a chemical element. The symbol for aluminium is Al, and its atomic number is 13. Aluminium is the most abundant...

uses heat and chemicals to get the fat out of the olives. Olive oil quality is defined by some parameters that are measured by chemical analysis. One...

Tellurous acid is a chemical compound. It is also an acid. Its chemical formula is H2TeO3. It contains hydrogen and tellurite ions. It can be made by...

Aluminium chloride (AlCl3), is a chemical compound. It is a white or yellow crystalline solid. It melts at a low temperature. It is made by reacting aluminium...

the speed at which the mixed substances move through special media, or chemical substances. It uses a stationary phase (a solid) and a mobile phase (a...

Fluorine (symbol F) is a chemical element that is very poisonous. Its atomic number (which is the number of protons in it) is 9, and its atomic mass is...

Hydrogen peroxide is a chemical compound. Its molecular formula is H2O2. It is used as a cleaner, and as hair bleach. In a concentration of 3% (meaning...

A molecule is the smallest amount of a chemical substance that can exist. If a molecule were split into smaller pieces, it would be a different substance...

An inorganic compound is a chemical compound that does not have carbon–hydrogen bonds that is, it is not an organic compound. That means it is not a carbon-based...

Gold is a soft, dense, bright yellow metal. It is a chemical element. Its chemical symbol is Au. Its atomic number is 79. As a precious metal, it has been...

W. L. (1989). Chemical kinetics and dynamics (Vol. 3). Englewood Cliffs (New Jersey): Prentice Hall. Espenson, J. H. (1995). Chemical kinetics and reaction...

Hydrogen fluoride is a chemical compound. It is a highly toxic colorless gas. Its chemical formula is HF. It dissolves in water to produce hydrofluoric...

mined. They can sometimes be found on the Earth's surface. Most ores are chemical compounds such as oxides or sulfides. There are different ways to get the...

Berkelium (IPA: /bəˈkiːliəm/) is a synthetic, radioactive, chemical element in the periodic table that has the symbol Bk and atomic number 97. It is a...

The halogens are chemical elements under the second-to-right column in the periodic table, also known as Group 17. The elements in the group are fluorine...

refer to: Chain reaction Chemical reaction, happens when one or more chemicals are changed into one or more other chemicals. Light reaction Nuclear reaction...

A group 12 element is a group in the periodic table of chemical elements. It includes zinc, cadmium, mercury, and copernicium. Copernicium is not stable...

transactinide elements". Journal of Physical Chemistry. 85 (9). American Chemical Society: 1177–1186. doi:10.1021/j150609a021. Fricke, B.; Waber, J. T. (1971)...

Phosphorus has the chemical symbol P, and its atomic number is 15. Its mass number is 30.97. It is not found in nature as an element, but as compounds...

German chemical company. Its headquarters are in Ludwigshafen, Rhineland-Palatinate. BASF was established in 1865. It is the biggest chemical company...

permanganic acid and manganese heptoxide, is a chemical compound. The manganese is in its +7 oxidation state. Its chemical formula is Mn2O7. This is about the only...

Coordination geometry is a type of molecular geometry, which shows how atoms and chemical bonds make shapes in molecules. Coordination geometry expands molecular...

Nobel Prize in Physiology or Medicine, for finding out how oxygen makes chemical changes in lactic acid in muscles. In 1940, Meyerhof fled to the United...

of the chemical element bromine. It is a bromine atom with one extra electron, making an anion. The bromide anion is written with the chemical formula...

Thallium(I) bromide, also known as thallous bromide, is a chemical compound. Its chemical formula is TlBr. It has thallium and bromide ions in it. The...

Potassium hydroxide is a chemical compound. The chemical formula is KOH. It has potassium and hydroxide ions. It is a white powder. It dissolves easily...

Argon is a chemical element. Its symbol is argon is Ar and its atomic number is 18. It is part of the noble gas group. It is an odorless and tasteless...

Potassium is a chemical element in the periodic table. It has the symbol K. This symbol is taken from the Latin word kalium. Potassium's atomic number...

sulfate, copper sulfate, blue vitriol, or bluestone, is a chemical compound. Its chemical formula is CuSO4. It contains copper in its +2 oxidation state...

Sodium amide, also known as sodamide, is a chemical compound. It contains sodium and amide ions. Its chemical formula is NaNH2. It is a very strong base...

nuclear, biological, and chemical weapons may be used. Biological weapons are living things, usually bacteria or viruses. Chemical weapons might not kill...

Chlorine dioxide is a chemical compound (a thing made when two or more chemical elements attach to each other). Its chemical formula is ClO2. The Cl means...

Copper is a chemical element. It is the 29th element in the periodic table. Its atomic weight is 63.55. It is a transition metal in the middle of the periodic...

Neon is a chemical element on the periodic table. It is part of the noble gas group and it has an atomic number of 10. It is an odorless and tasteless...

Iodine is a chemical element. Its atomic number (which is the number of protons in it) is 53, and its atomic mass (the number of protons plus neutrons)...

research, Olah was awarded a Nobel Prize in Chemistry in 1994. The American Chemical Society gave him its highest honor, the Priestley Medal. Olah was born...

isopropyl ketone, is a chemical compound with the molecular formula C5H10O. It is an organic compound that belongs to the class of chemicals known as ketones...

measures the amount of matter in chemical reactions. It can be used to predict the amount of things that will be made in a chemical reaction. It uses the law...

Hydrogen cyanide is a chemical compound which is a cyanide. Its chemical formula is HCN. Like most other cyanides, it is very toxic. It is also called...

Selenous acid, also known as selenious acid, is a chemical compound. Its chemical formula is H2SeO3. It is an acid. It contains hydrogen and selenite...

Bromine (Br) is a chemical element. Its atomic number (which is the number of protons in it) is 35, and its atomic weight is 80. It is part of the Group...

the chemical bonding forces. Their bonding energies are less than a few kcal/mol. But they are responsible for many different physical, chemical, and...

Farmers use a lot of chemical fertilizers, pesticides (chemicals that kill bugs), and herbicides (chemicals that kill weeds). These chemicals can pollute the...

Selenium hexafluoride, also known as selenium(VI) fluoride, is a chemical compound. Its chemical formula is SeF6. It contains selenium in its +6 oxidation state...

Zinc bromide is a chemical compound. Its chemical formula is ZnBr2. It contains zinc and bromide ions. Zinc bromide is a colorless solid. It dissolves...

convicted under the federal Chemical Weapons Implementation Act of 1998 for a local assault using a chemical irritant (a chemical that causes skin burns)...

Allotropy (or allotropism) is when a chemical element can exist in two or more different forms in the same physical state or phase. These different forms...

central to chemical metallurgy. Metallurgists are very interested in the chemical reactions that occur with different elements. Chemical reactions are...

an ion. Its chemical formula is ClO−3. It contains chlorine in the +5 oxidation state. It is a strong oxidizing agent. It exists in chemical compounds such...

Sodium telluride is a chemical compound. Its chemical formula is Na2Te. It contains sodium and telluride ions. It is a white solid when pure. It reacts...

refers to a group of atoms with the formula CH3 - one carbon atom with chemical bonds to three hydrogen atoms. It is a functional group in organic chemistry...

Cyanides are chemicals that contain the cyano-group C≡N. Organic compounds that contain the CN group are called nitriles. In that group a carbon atom...

known as selenous fluoride and selenium(IV) fluoride, is a chemical compound. Its chemical formula is SeF4. It contains selenium in its +4 oxidation state...

Gallium (chemical symbol: Ga) is element 31 on the periodic table. It is a soft, gray metal that is rare on Earth. It can easily be melted just by holding...

Butane is an organic compound with the chemical formula C 4H 10. It is an alkane with four carbon atoms. It is used as a fuel (sometimes with propane)...

Bleach is the name for a number of chemical substances which can be used to remove colors, or to make things white. Very often, they act through oxidation...

natural products. He worked closely with Roald Hoffmann on the theory of chemical reactions. Woodward won the Nobel Prize in Chemistry for 1965. Woodward...

also known as potash or pearl ash, is a chemical compound. It is made of potassium and carbonate ions. Its chemical formula is K2CO3. Potassium carbonate...

forms all with the same chemical formula. For instance, galactose and glucose are both aldohexoses, but they have different chemical and physical properties...

transformed into another. The size or shape of matter may be changed, but no chemical reaction occurs. All physical changes are reversible and their mass does...

Amides are two related groups of chemical compounds, both derived from ammonia and amines. In organic chemistry, amides are related to carboxylic acids...

enthalpy of vaporization helps us calculate these energy changes in many chemical reactions and physical processes. The enthalpy of vaporization is used...

vesicant, is a chemical compound that causes severe pain on the skin, in the eyes, and in the mucus membranes. They can cause severe chemical burns, which...

element is equal to the molar mass of the element. The molar mass of a chemical compound is the mass when the compound has 6.022 × 1023 molecules. Molar...

Lisa Perez Jackson (born February 8, 1962) is an American chemical engineer. She was the Administrator of the United States Environmental Protection Agency...

Adenosine diphosphate (or ADP) is the chemical that plants make ATP from, during photosynthesis. A chemical compound that can be converted to ATP with...

"Music:Response" is a 2000 song and extended play by The Chemical Brothers and is the fourth and final single from their third studio album Surrender....

Sodium bisulfite, also known as sodium hydrogen sulfite, is a chemical compound. Its chemical formula is NaHSO3. It is made of sodium and bisulfite ions...

/uːnˈbaɪtriəm/), also known as eka-protactinium or element 123, is the possible chemical element in the periodic table that has the temporary symbol Ubt and has...

as arsenious acid or arsenic(III) hydroxide, is a chemical compound. It is also an acid. Its chemical formula is As(OH)3. It has arsenic and hydroxide...

An isomer in chemistry is a chemical compound that has the same molecular formula as another, but it has a different arrangement of atoms in space. In...

Nobel Prize in Chemistry for his theory of electron transfer reactions in chemical systems. The Marcus theory is named after him. Marcus was born in Montreal...

An aqueous solution is a solution where the solvent is water. In a chemical equation it is written by adding (aq) to the formula. A solution of ordinary...

Perchlorate is an ion. Its chemical formula is ClO−4. It contains chlorine in its +7 oxidation state. It is present in chemical compounds like ammonium perchlorate...

compound with the chemical formula (CH 2OH)2. It is used to make polyester and to make antifreeze. NIOSH Pocket Guide to Chemical Hazards. "#0272". National...

Iron(II,III) oxide is one of the iron oxides, chemical compounds made of iron and oxygen. It is found in nature as the mineral magnetite. It can be a black...

shows how the chemical composition of a polymer consists of many smaller units (monomers) bonded together into a larger molecule. A chemical reaction bonding...

Sodium tellurite is a chemical compound. Its chemical formula is Na2TeO3. It contains sodium and tellurite ions. Sodium tellurite is a colorless solid...

Dysprosium (pronounced /dɪsˈproʊziəm/) is a chemical element with the symbol Dy and atomic number 66. It has a very high melting temperature of 1,407°C...

Hydrazine, also known as diazine, is a chemical compound. It is composed of nitrogen and hydrogen ions. Its chemical formula is N2H4. It contains hydrogen...

drugs which a person is not allowed to own or use by law. A drug is any chemical that affects the human body or mind when taken in any way. Each country...

be made from plant or animal parts, or it can be made from oil-based chemicals. Glue can also be made from rice or rice flour. The first glues may have...

also known as mercuric chloride and corrosive sublimate, is a chemical compound. Its chemical formula is HgCl2. It has mercury and chloride ions in it. The...

An electrolyte is a chemical that conducts electrical current. It is used in batteries to make the ions flow, producing current. Electrolytes ionize when...

carboxylic acid. It is the main compound of vinegar, other than water. The chemical formula is CH3COOH (also written as CH3CO2H, HC2H3O2, or C2H4O2). It tastes...

known as aluminum selenide or aluminium(III) selenide, is a chemical compound. Its chemical formula is Al2Se3. It contains aluminium in its +3 oxidation...

and Martin Karplus for "the development of multiscale models for complex chemical systems". Warshel is a member of the following scientific organizations:...

Thallium(I) sulfide, also known as thallous sulfide, is a chemical compound. Its chemical formula is Tl2S. It has thallium and sulfide ions in it. The...

state of Hesse. It has about 140,000 inhabitants and a university. The chemical element named darmstadtium is named after the city. "Bevölkerung in Hessen...

Sodium selenite is a chemical compound. Its chemical formula is Na2SeO3. It contains sodium and selenite ions. Sodium selenite is a white solid. It dissolves...

Bismuth(V) fluoride, also known as bismuth pentafluoride, is a chemical compound. Its chemical formula is BiF5. It has five bismuth-fluorine bonds in it....

Praseodymium is a chemical element that has the symbol Pr on the periodic table. It has the atomic number 59 which means it has 59 protons in an atom....

A double bond in chemistry is when two chemical elements are joined together in a chemical bond and share four bonding electrons instead of the usual...

Flerovium is a synthetic chemical element also known as eka-lead. It has the symbol Fl and has the atomic number 114. It is a radioactive superheavy element...

List of chemicals used in cases of doping in sport. There have been years, when sportspeople got sanctions (or punishment), if a test showed use of one...

of oil. Chemical engineers refine the petroleum which goes through a heating process. It develops ethylene and propylene, which are the chemical building...

increases, the element have different properties. A new row begins when chemical properties repeat. It means that elements in the same group have similar...

(/ˌuːntraɪˈsɛptiəm/), also called eka-dubnium[source?] or element 137, is a possible chemical element which has not been synthesized. Due to instabilities, it is not...

break with heat"), is a process where heat causes a chemical compound to break down into simpler chemical compounds or elements. If the compound is exposed...

does not side with any of the parties in a conflict Neutral solution, a chemical solution that is neither acidic nor alkaline Neutralization Neutral particle...

Jersey. Toro is the lead guitarist and one of two backup vocalists for My Chemical Romance. He plays Gibson Les Paul guitars with Seymour Duncan pickups through...

Manganese(II) oxide is a chemical compound. It contains manganese in its +2 oxidation state. Its chemical formula is MnO. It is made by reduction of manganese(IV)...

which chemical they make depending on how much of other chemicals are already in the blood. So, the pancreas works to keep the level of chemicals in balance...

known as quicksilver or hydrargyrum (pronounced hai-DRAR-jər-əm), is a chemical element. Its symbol on the periodic table is Hg, and its atomic number...

Ozone, or trioxygen, is a chemical with the symbol O3. This means one molecule of ozone is made of three oxygen atoms. Ozone is rarely called trioxygen...

The atoms of a chemical element can exist in different types that have very similar behavior, but weigh different amounts. These are called isotopes of...

Hydrogen chloride is a chemical compound. It has the chemical formula HCl. It is the most common hydrogen halide, usually found in an aqueous solution...

Alanine (abbreviated as Ala or A) is an α-amino acid. It has the chemical formula CH3CH(NH2)COOH. The L-isomer is one of the 20 amino acids encoded by...

also known as cobaltic fluoride and cobalt trifluoride, is a chemical compound. Its chemical formula is CoF3. It contains cobalt in its +3 oxidation state...

Manganese(II) fluoride is a chemical compound. Its chemical formula is MnF2. It is made by reacting manganese(II) carbonate or manganese(II) oxide with...

radioactive. They all have 5 valence electrons but most of them form +5 or -3 chemical compounds. Red phosphorus Arsenic Antimony Bismuth This short article about...

chemicals that do specific things. A chemical can have different properties. Pharmacokinetics describes the effect the body will have on the chemical...

form the solution. Solubility Solution Dogonadze, Revaz R. (1985). The Chemical Physics of Solvation. Amsterdam: Elsevier. ISBN 0-444-42551-9 (part A)...

also known as stannic chloride or tin tetrachloride, is a chemical compound. Its chemical formula is SnCl4. It contains tin and chloride ions. The tin...

August 1779 – 7 August 1848) was a Swedish chemist. He invented the modern chemical notation. Berzelius, John Dalton and Antoine Lavoisier are said to be the...

Council. Carbon, hydrogen, nitrogen, oxygen and phosphorus are a group of chemical elements that life needs. This short article can be made longer. You can...

chemical name is 17-hydroxy-11-dehydrocorticosterone. It is one of the main hormones released by the adrenal gland in response to stress. In chemical...

Cori and her husband's work was designated an ACS National Historical Chemical Landmark for carbohydrate metabolism. Cori died at the age of 61 on October...

Tellurium(IV) oxide, also known as tellurium dioxide, is a chemical compound. Its chemical formula is TeO2. It contains tellurium in its +4 oxidation...

regulatory circuits, and organisms. She is the Linus Pauling Professor of Chemical Engineering, Bioengineering, and Biochemistry at the California Institute...

Corrosion is the breakdown of materials due to chemical reactions. It is usually oxidation with air molecules and often in the presence of water. Corrosion...

Zinc antimonide is a chemical compound. Its chemical formula is ZnSb. It has zinc and antimonide ions in it. Zinc antimonide is a gray solid. Its properties...

the spaces between them. All anions are Brønsted bases: they can make a chemical bond with a proton, H+, to form a conjugate acid. Oxide is the most common...

alloy is a solution of metals. Most alloys are shiny like pure metals are. Chemical bond Covalent bond Ionic bond Coordination complex Alloy "metallic bonding"...

Calcium nitride is a chemical compound. Its chemical formula is Ca3N2. It contains calcium and nitride ions. It is a red-brown solid. It reacts with water...

Sodium fluoride is a chemical compound. It is made of sodium and fluoride ions. Its chemical formula is NaF. It tastes bitter and is toxic. It is made...

Chloric acid is a chemical compound. It is also an acid. Its chemical formula is HClO3. It contains chlorate and hydrogen ions. Chloric acid is a colorless...

Peroxide is an ion. Its chemical formula is O2−2. Peroxide can be a reducing agent or an oxidizing agent. More often it is an oxidizing agent. It can be...

paints and dyes. The first synthetic dye was aniline. Aniline is an organic chemical compound produced in two stages from benzene. It gives a mauve color which...

The chemical element is called Phosphorus in English A phosphor is a chemical compound that emits light when it is exposed to light of a different wavelength...

sixteen miles from Angleton. Dow Chemical is the major employer in Freeport, as the company operates a large chemical plant complex in Freeport. "The City...

Barium sulfate is a chemical compound composed of barium and sulfate ions. It contains barium in the +2 oxidation state, as in all barium compounds. It...

Sodium iodide is a chemical compound. It is composed of sodium and iodide ions. The chemical formula is NaI. It is a white crystalline solid. It is a...

Polychlorinated biphenyls (often shortened to PCBs) are organic chemical compounds that contain chlorine atoms. They were used in industrial chemistry...

atmosphere that make air slightly radioactive. Nuclear reactions differ from chemical reactions in that they do not need a catalyst. Radioactive decay also cannot...

make chemical compounds are present in set proportions. Chemical changes correspond to a reorganization of the atoms taking part in the chemical reaction...

name: phosphonate) is an ion. Its chemical formula is HPO2−3. It contains phosphorus in its +3 oxidation state. Chemical compounds containing the phosphite...

In planetary science, volatiles are the group of chemical elements and compounds with a low boiling point. They are often found in the crust or atmosphere...

"oscillate". Such circuits can be used to make sounds or radio waves. Different chemicals, when you mix them together in the right order, can make some new things...

removed for the condensation to continue. Desalination IUPAC, Compendium of Chemical Terminology, 5th ed. (the "Gold Book") (2025). Online version: (2006–)...

Sulfur trioxide (sometimes spelled sulphur trioxide) is a chemical substance made of 1 sulfur and 3 oxygen atoms (SO3). It is very toxic and irritating...

characters, where an entire chemical structure is written in a sequence of characters on a single line. It is most often used for chemical nomenclature. Line notation...

Rubidium hydride is a chemical compound. It contains rubidium and hydride ions. Its chemical formula is RbH. It is a strong reducing agent and will react...

each other. Instead they have tiny gaps called synapses. These gaps are chemical synapses or electrical synapses which pass the signal from one neuron to...

also called methyl ethyl ketone (MEK), is an organic compound with the chemical formula CH3C(O)CH2CH3. It is a simple ketone with four carbon atoms. It...

dummer and sound engineer. He was the drummer for My Chemical Romance. Bryar joined My Chemical Romance after former drummer Matt Pelissier suddenly left...

"Star Guitar" is a 2002 song by The Chemical Brothers and is the second single from their fourth studio album Come with Us. It went to number 8 in the...

The actinide series is the 15 chemical elements between actinium and lawrencium on the periodic table. They have the atomic numbers between 89 and 103...

In chemistry, a salt is any neutral chemical compound made of cations (positive ions) attached to anions (negative ions). The most common example of a...

Potassium fluoride is a chemical compound. Its chemical formula is KF. It contains potassium and fluoride ions. Potassium fluoride is a colorless crystalline...

Chlorine trifluoride is a chemical compound. Its chemical formula is ClF3. It contains chlorine and fluoride ions. The chlorine is in its +3 oxidation...

is a type of flask. It is a piece of laboratory glassware. It can hold chemical solutions. The flask has a round body with a long neck. The flask usually...

Lawrencium is a chemical element. Before being officially named, it was known as eka-lutetium and unniltrium. It has the symbol Lr. It has the atomic number...

(1994). Nobel Laureates in Chemistry, 1901–1992. American Chemical Society and Chemical Heritage Foundation. p. 737. ISBN 0-8412-2459-5. Retrieved 2011-09-11...

Calcium is a chemical element. Its symbol on the periodic table (a list of all the elements) is Ca. and its atomic number is 20. The atomic number says...

Techniques include dissection, microscopic examination of tissues and chemical analysis of body fluids. A pathologist may also perform an autopsy, to...

Zinc nitrate is a chemical compound. Its chemical formula is Zn(NO3)2. It contains zinc and nitrate ions. Zinc nitrate is a colorless solid. It dissolves...

Aluminium sulfate, sometimes spelled aluminum or sulphate, is a chemical compound. Its chemical formula is Al2(SO4)3. It is a white crystalline solid. It can...

Telluric acid is a chemical compound. It is an acid. Its chemical formula is H6TeO6. It contains hydrogen and tellurate ions. It contains the TeO66- form...

Sulfur tetrafluoride, also known as sulfur(IV) fluoride, is a chemical compound. Its chemical formula is SF4. It contains sulfur in its +4 oxidation state...

He was called by the Chemical & Engineering News poll of 1998 to be one of the "Top 75 Distinguished Contributors to the Chemical Enterprise" during C&EN's...

Sodium nitrite is a chemical compound. It contains sodium and nitrite ions. Its chemical formula is NaNO2. It is a white or yellowish crystalline compound...

caustic soda takes its name from the way it can burn the skin. It has the chemical formula of NaOH. It is a base, meaning it has a high pH. It is the most...

Sodium chromate is a chemical compound composed of sodium ions and chromate ions. It is a bright yellow crystal chemical. It is similar to potassium chromate...

Thallium(III) oxide, also known as thallic oxide, is a chemical compound. Its chemical formula is Tl2O3. It has thallium and oxide ions in it. The thallium...

organic compound with the chemical formula C 2H 4O. It is the simplest epoxide. Haynes, p. 3.430 NIOSH Pocket Guide to Chemical Hazards. "#0275". National...

Potassium nitrate is a chemical compound. It has the chemical formula KNO3. It contains potassium and nitrate ions. It is often called saltpeter. Potassium...

Alum is both a specific chemical compound and a class of chemical compounds. It means potassium aluminium sulfate, a chemical compound. It also means...

Tennessine is a radioactive superheavy man-made chemical element. It has a symbol Ts and atomic number of 117. It is the second heaviest element of all...

Nerve gas or nerve agent is the name of a family of chemical poisons. Usually people call them nerve agents (they are not always gases). They work by changing...

the French chemist Jean Rouelle. It is also called Carbamide, and its chemical names are Carbonyl Diamide (used in inorganic chemistry) and Diaminomethanal...

Fermium (symbol Fm) is a chemical element. It has an atomic number of 100, which makes it at position 100 at the periodic table. Fermium cannot be found...

Hypophosphite, also known as phosphinate, is an ion. Its chemical formula is H2PO−2. It contains phosphorus in its +1 oxidation state. It is made by disproportionation...

Iron(II) oxide is an chemical compound composed of iron in the +2 oxidation state bonded to oxygen atoms. It easily converts to a mixture of iron and iron(II...

(2001) Autobiography Biographical snapshots: Ryoji Noyori, Journal of Chemical Education web site. This short article about a person or group of people...

Lead(IV) oxide, also known as lead dioxide, is a chemical compound. It is composed of lead in its +4 oxidation state. It is an oxidizing agent. It is a...

as calomel and mercurous chloride, is a chemical compound made of mercury and chlorine. It has the chemical formula Hg2Cl2. It has one mercurous cation...

Nissan-lez-Enserune, village near Béziers, France Nissan Chemical Corporation, a Japanese chemical company Nissan Computer, Not related to Nissan Motor Corperation...

also known as antimony(III) fluoride or Swart's reagent, is a chemical compound. Its chemical formula is SbF3. It has antimony and fluoride ions in it. The...

which is chemically changed into a soluble compound. It is then dissolved and forced through a spinneret to produce filaments. These are chemically solidified...

Zinc sulfate is a chemical compound. Its chemical formula is ZnSO4. It contains zinc and sulfate ions. Zinc sulfate is a colorless solid. It dissolves...

Thorium is a chemical element in actinide group. It is a weakly radioactive metal. It has a shiny, silvery white color. It has the chemical symbol Th and...

Cyclopentane (also called C pentane) has a chemical formula C5H10. It is usually formed by cracking cyclohexane in the presence of high temperature and...

Calcium nitrate, also known as Norwegian saltpeter, is a chemical compound. Its chemical formula is Ca(NO3)2. It contains calcium and nitrate ions. Calcium...

Sodium periodate is a chemical compound. Its chemical formula can be NaIO4 (sodium metaperiodate) or Na5IO6 (sodium orthoiodate). It has sodium and periodate...

Martín-Gil, F.J.; José-Yacamán, M. (2006), "Chemical composition of a fountain pen ink", Journal of Chemical Education, 83 (10): 1476–1478, doi:10.1021/ed083p1476...

An antibiotic (or antibacterial) is a chemical compound is made to kill bacteria or slow their growth. They are used as medicines to treat and cure disease...

is very common in diets. "Chloride" is also used as a general name for chemical compounds containing chlorine in the -1 oxidation state, whether or not...

scientific study of rocks. Rocks are classified by their minerals and chemical make-up. The processes that formed them are also noted. Rocks may be igneous...

atom. They determine the valency of the atom which is important in how a chemical element reacts with other elements. Elements which have eight valence electrons...

Hormones are the chemical messengers of the endocrine system. Hormones are the signals which adjust the body's internal working, together with the nervous...

Sulfurous acid is a weak acid with the chemical formula H2SO3. It is produced by dissolving sulfur dioxide in water. Bases deprotonate (remove the hydrogen...

ISBN 978-9401142137. Trimble, Virginia (1996). "The origin and evolution of the chemical elements". In Malkan, Matthew A.; Zuckerman, Ben (eds.). The origin and...

An alkaloid is a chemical compound that can be made naturally. They contain basic nitrogen atoms. The name comes from the word alkaline and was used to...

Hassium is a very radioactive and unstable chemical element. It has the symbol Hs and it has the atomic number 108. It is a superheavy transuranium element...

sometimes called dimethyl mercury, is a chemical compound. It contains methyl and mercury ions. Its chemical formula is (CH3)2Hg. It is a colorless liquid...

Mercury(II) oxide is a chemical compound. Its chemical formula is HgO. It has mercury and oxide ions. The mercury is in the +2 oxidation state. It is...

you are working on these places. Chemical accidents can happen in a laboratory. Especially, some students make chemical mistakes that injure them seriously...

(water-loving) that forms chemical bonds with water but not with oils, and a hydrophobic end (water-hating lipophile) that forms chemical bonds with oils but...