This is a list of elements by atomic number with symbol.
List of elements
Atomic
Number
|
Name
|
Symbol
|
Group
|
Period
Number
|
1
|
Hydrogen
|
H
|
1
|
1
|
2
|
Helium
|
He
|
18
|
1
|
3
|
Lithium
|
Li
|
1
|
2
|
4
|
Beryllium
|
Be
|
2
|
2
|
5
|
Boron
|
B
|
13
|
2
|
6
|
Carbon
|
C
|
14
|
2
|
7
|
Nitrogen
|
N
|
15
|
2
|
8
|
Oxygen
|
O
|
16
|
2
|
9
|
Fluorine
|
F
|
17
|
2
|
10
|
Neon
|
Ne
|
18
|
2
|
11
|
Sodium
|
Na
|
1
|
3
|
12
|
Magnesium
|
Mg
|
2
|
3
|
13
|
Aluminium
|
Al
|
13
|
3
|
14
|
Silicon
|
Si
|
14
|
3
|
15
|
Phosphorus
|
P
|
15
|
3
|
16
|
Sulfur
|
S
|
16
|
3
|
17
|
Chlorine
|
Cl
|
17
|
3
|
18
|
Argon
|
Ar
|
18
|
3
|
19
|
Potassium
|
K
|
1
|
4
|
20
|
Calcium
|
Ca
|
2
|
4
|
21
|
Scandium
|
Sc
|
3
|
4
|
22
|
Titanium
|
Ti
|
4
|
4
|
23
|
Vanadium
|
V
|
5
|
4
|
24
|
Chromium
|
Cr
|
6
|
4
|
25
|
Manganese
|
Mn
|
7
|
4
|
26
|
Iron
|
Fe
|
8
|
4
|
27
|
Cobalt
|
Co
|
9
|
4
|
28
|
Nickel
|
Ni
|
10
|
4
|
29
|
Copper
|
Cu
|
11
|
4
|
30
|
Zinc
|
Zn
|
12
|
4
|
33
|
- Second list
Chemical sym |
Name |
Origin of symbol |
Atomic No. |
Atomic mass |
Density (near r.t.) |
Melting point |
Boiling point
|
Year of discovery
|
Discoverer
|
Ac |
Actinium |
|
89 |
227.0278 u |
10.07 g/cm3 |
1047 °C |
3197 °C |
1899 |
Debierne
|
Ag |
Silver |
Latin Argentum |
47 |
107.8682 u |
10.49 g/cm3 |
961.9 °C |
2212 °C |
prehistoric |
unknown
|
Al |
Aluminium |
|
13 |
26.981539 u |
2.70 g/cm3 |
660.5 °C |
2467 °C |
1825 |
Oersted
|
Am |
Americium |
|
95 |
243.0614 u |
13.67 g/cm3 |
994 °C |
2607 °C |
1944 |
Seaborg
|
Ar |
Argon |
|
18 |
39.948 u |
1.66 g/l |
-189.4 °C |
-185.9 °C |
1894 |
Ramsay and Rayleigh
|
As |
Arsenic |
|
33 |
74.92159 u |
5.72 g/cm3 |
613 °C |
613 (Subl.) °C |
ca. 1250 |
Albertus Magnus
|
At |
Astatine |
|
85 |
209.9871 u |
7 g/cm3
|
302 °C |
337 °C |
1940 |
Corson and MacKenzie
|
Au |
Gold |
Latin Aurum |
79 |
196.96654 u |
19.32 g/cm3 |
1064.4 °C |
2940 °C |
prehistoric |
unknown
|
B |
Boron |
|
5 |
10.811 u |
2.46 g/cm3 |
2300 °C |
2550 °C |
1808 |
Davy and Gay-Lussac
|
Ba |
Barium |
|
56 |
137.327 u |
3.65 g/cm3 |
725 °C |
1640 °C |
1808 |
Davy
|
Be |
Beryllium |
|
4 |
9.012182 u |
1.85 g/cm3 |
1278 °C |
2970 °C |
1797 |
Vauqueli
|
Bh |
Bohrium |
|
107 |
262. |
|
|
|
1976 |
Oganessian
|
Bi |
Bismuth |
|
83 |
208.98037 u |
9.80 g/cm3 |
271.4 °C |
1560 °C |
1540 |
Agricola
|
Bk |
Berkelium |
|
97 |
247.0703 u |
13.25 g/cm3 |
986 °C |
2627 °C
|
1949 |
Seaborg
|
Br |
Bromine |
|
35 |
79.904 u |
3.14 g/cm3 |
-7.3 °C |
58.8 °C |
1826 |
Balard
|
C |
Carbon |
|
6 |
12.011 u |
3.51 g/cm3 |
3550 °C |
4827 °C |
prehistoric |
unknown
|
Ca |
Calcium |
|
20 |
40.078 u |
1.54 g/cm3 |
839 °C |
1487 °C |
1808 |
Davy
|
Cd |
Cadmium |
|
48 |
112.411 u |
8.64 g/cm3 |
321 °C |
765 °C |
1817 |
Stromeyer and Hermann
|
Ce |
Cerium |
|
58 |
140.115 u |
6.77 g/cm3 |
798 °C |
3257 °C |
1803 |
von Hisinger and Berzelius
|
Cf |
Californium |
|
98 |
251.0796 u |
15.1 g/cm3 |
900 °C |
1472 °C
|
1950 |
Seaborg
|
Cl |
Chlorine |
|
17 |
35.4527 u |
2.95 g/l |
-34.6 °C |
-101 °C |
1774 |
Scheele
|
Cm |
Curium |
|
96 |
247.0703 u |
13.51 g/cm3 |
1340 °C |
3110 °C
|
1944 |
Seaborg
|
Cn
|
Copernicium
|
|
112
|
277 u
|
|
|
|
1996
|
Society for Heavy Ion Research
|
Co |
Cobalt |
|
27 |
58.9332 u |
8.89 g/cm3 |
1495 °C |
2870 °C |
1735 |
Brandt
|
Cr |
Chromium |
|
24 |
51.9961 u |
7.14 g/cm3 |
1857 °C |
2482 °C |
1797 |
Vauquelin
|
Cs |
Caesium |
|
55 |
132.90543 u |
1.90 g/cm3 |
28.4 °C |
690 °C |
1860 |
Kirchhoff and Bunsen
|
Cu |
Copper |
Latin Cuprum |
29 |
63.546 u |
8.92 g/cm3 |
1083.5 °C |
2595 °C |
prehistoric |
unknown
|
Db |
Dubnium |
|
105 |
262.1138 u |
|
|
|
1967/70 |
Flerow oder Ghiorso
|
Ds |
Darmstadtium |
|
110 |
269 u |
|
|
|
1994 |
Society for Heavy Ion Research
|
Dy |
Dysprosium |
|
66 |
162.5 u |
8.56 g/cm3 |
1409 °C |
2335 °C |
1886 |
Lecoq de Boisbaudran
|
Er |
Erbium |
|
68 |
167.26 u |
9.05 g/cm3 |
1522 °C |
2510 °C |
1842 |
Mosander
|
Es |
Einsteinium |
|
99 |
252.0829 u |
|
860 °C |
|
1952 |
Seaborg
|
Eu |
Europium |
|
63 |
151.965 u |
5.25 g/cm3 |
822 °C |
1597 °C |
1901 |
Demaçay
|
F |
Fluorine |
|
9 |
18.9984032 u |
1.58 g/l |
-219.6 °C |
-188.1 °C |
1886 |
Moissan
|
Fe |
Iron |
Latin Ferrum |
26 |
55.847 u |
7.87 g/cm3 |
1535 °C |
2750 °C |
prehistoric |
unknown
|
Fl
|
Flerovium
|
|
114
|
|
|
|
|
|
|
Fm |
Fermium |
|
100 |
257.0951 u |
|
|
|
1952 |
Seaborg
|
Fr |
Francium |
|
87 |
223.0197 u |
|
27 °C |
677 °C |
1939 |
Perey
|
Ga |
Gallium |
|
31 |
69.723 u |
5.91 g/cm3 |
29.8 °C |
2403 °C |
1875 |
Lecoq de Boiskaudran
|
Gd |
Gadolinium |
|
64 |
157.25 u |
7.89 g/cm3 |
1311 °C |
3233 °C |
1880 |
de Marignac
|
Ge |
Germanium |
|
32 |
72.61 u |
5.32 g/cm3 |
937.4 °C |
2830 °C |
1886 |
Winkler
|
H |
Hydrogen |
|
1 |
1.00794 u |
0.084 g/l |
-259.1 °C |
-252.9 °C |
1766 |
Cavendish
|
He |
Helium |
|
2 |
4.002602 u |
0.17 g/l |
-272.2 °C |
-268.9 °C |
1895 |
Ramsay and Cleve
|
Hf |
Hafnium |
|
72 |
178.49 u |
13.31 g/cm3 |
2150 °C |
5400 °C |
1923 |
Coster and vón Hevesy
|
Hg |
Mercury |
Latin Hydragyrum - quicksilver |
80 |
200.59 u |
13.55 g/cm3 |
-38.9 °C |
356.6 °C |
prehistoric |
unknown
|
Ho |
Holmium |
|
67 |
164.93032 u |
8.78 g/cm3 |
1470 °C |
2720 °C |
1878 |
Soret
|
Hs |
Hassium |
|
108 |
265 u |
|
|
|
1984 |
Society for Heavy Ion Research
|
I |
Iodine |
|
53 |
126.90447 u |
4.94 g/cm3 |
113.5 °C |
184.4 °C |
1811 |
Courtois
|
In |
Indium |
|
49 |
114.82 u |
7.31 g/cm3 |
156.2 °C |
2080 °C |
1863 |
Reich and Richter
|
Ir |
Iridium |
|
77 |
192.22 u |
22.65 g/cm3 |
2410 °C |
4130 °C |
1803 |
Tenant and andere
|
K |
Potassium |
German Kalium |
19 |
39.0983 u |
0.86 g/cm3 |
63.7 °C |
774 °C |
1807 |
Davy
|
Kr |
Krypton |
|
36 |
83.8 u |
3.48 g/l |
-156.6 °C |
-152.3 °C |
1898 |
Ramsay and Travers
|
La |
Lanthanum |
|
57 |
138.9055 u |
6.16 g/cm3 |
920 °C |
3454 °C |
1839 |
Mosander
|
Li |
Lithium |
|
3 |
6.941 u |
0.53 g/cm3 |
180.5 °C |
1317 °C |
1817 |
Arfvedson
|
Lr |
Lawrencium |
|
103 |
260.1053 u |
|
|
|
1961 |
Ghiorso
|
Lu |
Lutetium |
|
71 |
174.967 u |
9.84 g/cm3 |
1656 °C |
3315 °C |
1907 |
Urbain
|
Lv
|
Livermorium
|
|
116
|
|
|
|
|
|
|
Mc
|
Moscovium
|
|
115
|
|
|
|
|
|
|
Md |
Mendelevium |
|
101 |
258.0986 u |
|
|
|
1955 |
Seaborg
|
Mg |
Magnesium |
|
12 |
24.305 u |
1.74 g/cm3 |
648.8 °C |
1107 °C |
1755 |
Black
|
Mn |
Manganese |
|
25 |
54.93805 u |
7.44 g/cm3 |
1244 °C |
2097 °C |
1774 |
Gahn
|
Mo |
Molybdenum |
|
42 |
95.94 u |
10.28 g/cm3 |
2617 °C |
5560 °C |
1778 |
Scheele
|
Mt |
Meitnerium |
|
109 |
266 u |
|
|
|
1982 |
Society for Heavy Ion Research
|
N |
Nitrogen |
|
7 |
14.00674 u |
1.17 g/l |
-209.9 °C |
-195.8 °C |
1772 |
Rutherford
|
Na |
Sodium |
Latin Natrium |
11 |
22.989768 u |
0.97 g/cm3 |
97.8 °C |
892 °C |
1807 |
Davy
|
Nb |
Niobium |
|
41 |
92.90638 u |
8.58 g/cm3 |
2468 °C |
4927 °C |
1801 |
Hatchet
|
Nd |
Neodymium |
|
60 |
144.24 u |
7.00 g/cm3 |
1010 °C |
3127 °C |
1895 |
von Welsbach
|
Ne |
Neon |
|
10 |
20.1797 u |
0.84 g/l |
-248.7 °C |
-246.1 °C |
1898 |
Ramsay and Travers
|
Nh
|
Nihonium
|
|
113
|
|
|
|
|
|
|
Ni |
Nickel |
|
28 |
58.69 u |
8.91 g/cm3 |
1453 °C |
2732 °C |
1751 |
Cronstedt
|
No |
Nobelium |
|
102 |
259.1009 u |
|
|
|
1958 |
Seaborg
|
Np |
Neptunium |
|
93 |
237.0482 u |
20.48 g/cm3 |
640 °C |
3902 °C |
1940 |
McMillan and Abelson
|
O |
Oxygen |
|
8 |
15.9994 u |
1.33 g/l |
-218.4 °C |
-182.9 °C |
1774 |
Priestley and Scheele
|
Og
|
Oganesson
|
|
118
|
|
|
|
|
|
|
Os |
Osmium |
|
76 |
190.2 u |
22.61 g/cm3 |
3045 °C |
5027 °C |
1803 |
Tenant
|
P |
Phosphorus |
|
15 |
30.973762 u |
1.82 g/cm3 |
44 (P4) °C |
280 (P4) °C |
1669 |
Brandt
|
Pa |
Protactinium |
|
91 |
231.0359 u |
15.37 g/cm3 |
1554 °C |
4030 °C |
1917 |
Soddy, Cranston and Hahn
|
Pb |
Lead |
Latin Plumbum |
82 |
207.2 u |
11.34 g/cm3 |
327.5 °C |
1740 °C |
prehistoric |
unknown
|
Pd |
Palladium |
|
46 |
106.42 u |
12.02 g/cm3 |
1552 °C |
3140 °C |
1803 |
Wollaston
|
Pm |
Promethium |
|
61 |
146.9151 u |
7.22 g/cm3 |
1080 °C |
2730 °C |
1945 |
Marinsky and Glendenin
|
Po |
Polonium |
|
84 |
208.9824 u |
9.20 g/cm3 |
254 °C |
962 °C |
1898 |
Marie and Pierre Curie
|
Pr |
Praseodymium |
|
59 |
140.90765 u |
6.48 g/cm3 |
931 °C |
3212 °C |
1895 |
von Welsbach
|
Pt |
Platinum |
|
78 |
195.08 u |
21.45 g/cm3 |
1772 °C |
3827 °C |
1557 |
Scaliger
|
Pu |
Plutonium |
|
94 |
244.0642 u |
19.74 g/cm3 |
641 °C |
3327 °C |
1940 |
Seaborg
|
Ra |
Radium |
|
88 |
226.0254 u |
5.50 g/cm3 |
700 °C |
1140 °C |
1898 |
Marie and Pierre Curie
|
Rb |
Rubidium |
|
37 |
85.4678 u |
1.53 g/cm3 |
39 °C |
688 °C |
1861 |
Bunsen and Kirchhoff
|
Re |
Rhenium |
|
75 |
186.207 u |
21.03 g/cm3 |
3180 °C |
5627 °C |
1925 |
Noddack, Tacke and Berg
|
Rf |
Rutherfordium |
|
104 |
261.1087 u |
|
|
|
1964/69 |
Flerow oder Ghiorso
|
Rg |
Roentgenium |
|
111 |
272 u |
|
|
|
1994 |
Society for Heavy Ion Research
|
Rh |
Rhodium |
|
45 |
102.9055 u |
12.41 g/cm3 |
1966 °C |
3727 °C |
1803 |
Wollaston
|
Rn |
Radon |
|
86 |
222.0176 u |
9.23 g/l |
-71 °C |
-61.8 °C |
1900 |
Dorn
|
Ru |
Ruthenium |
|
44 |
101.07 u |
12.45 g/cm3 |
2310 °C |
3900 °C |
1844 |
Claus
|
S |
Sulfur |
|
16 |
32.066 u |
2.06 g/cm3 |
113 °C |
444.7 °C |
prehistoric |
unknown
|
Sb |
Antimony |
Latin Stibium |
51 |
121.75 u |
6.69 g/cm3 |
630.7 °C |
1750 °C |
prehistoric |
unknown
|
Sc |
Scandium |
|
21 |
44.95591 u |
2.99 g/cm3 |
1539 °C |
2832 °C |
1879 |
Nilson
|
Se |
Selenium |
|
34 |
78.96 u |
4.82 g/cm3 |
217 °C |
685 °C |
1817 |
Berzelius
|
Sg |
Seaborgium |
|
106 |
263.1182 u |
|
|
|
1974 |
Oganessian
|
Si |
Silicon |
|
14 |
28.0855 u |
2.33 g/cm3 |
1410 °C |
2355 °C |
1824 |
Berzelius
|
Sm |
Samarium |
|
62 |
150.36 u |
7.54 g/cm3 |
1072 °C |
1778 °C |
1879 |
Lecoq de Boisbaudran
|
Sn |
Tin |
Latin Stannum |
50 |
118.71 u |
7.29 g/cm3 |
232 °C |
2270 °C |
prehistoric |
unknown
|
Sr |
Strontium |
|
38 |
87.62 u |
2.63 g/cm3 |
769 °C |
1384 °C |
1790 |
Crawford
|
Ta |
Tantalum |
|
73 |
180.9479 u |
16.68 g/cm3 |
2996 °C |
5425 °C |
1802 |
Ekeberg
|
Tb |
Terbium |
|
65 |
158.92534 u |
8.25 g/cm3 |
1360 °C |
3041 °C |
1843 |
Mosander
|
Tc |
Technetium |
|
43 |
98.9063 u |
11.49 g/cm3 |
2172 °C |
5030 °C |
1937 |
Perrier and Segrè
|
Te |
Tellurium |
|
52 |
127.6 u |
6.25 g/cm3 |
449.6 °C |
990 °C |
1782 |
von Reichenstein
|
Th |
Thorium |
|
90 |
232.0381 u |
11.72 g/cm3 |
1750 °C |
4787 °C |
1829 |
Berzelius
|
Ti |
Titanium |
|
22 |
47.88 u |
4.51 g/cm3 |
1660 °C |
3260 °C |
1791 |
Gregor and Klaproth
|
Tl |
Thallium |
|
81 |
204.3833 u |
11.85 g/cm3 |
303.6 °C |
1457 °C |
1861 |
Crookes
|
Tm |
Thulium |
|
69 |
168.93421 u |
9.32 g/cm3 |
1545 °C |
1727 °C |
1879 |
Cleve
|
Ts |
Tennessine |
|
117 |
|
|
|
|
|
|
U |
Uranium |
|
92 |
238.0289 u |
18.97 g/cm3 |
1132.4 °C |
3818 °C |
1789 |
Klaproth
|
V |
Vanadium |
|
23 |
50.9415 u |
6.09 g/cm3 |
1890 °C |
3380 °C |
1801 |
del Rio
|
W |
Tungsten |
German Wolfram |
74 |
183.85 u |
19.26 g/cm3 |
3407 °C |
5927 °C |
1783 |
Gebrüder de Elhuyar
|
Xe |
Xenon |
|
54 |
131.29 u |
4.49 g/l |
-111.9 °C |
-107 °C |
1898 |
Ramsay and Travers
|
Y |
Yttrium |
|
39 |
88.90585 u |
4.47 g/cm3 |
1523 °C |
3337 °C |
1794 |
Gadolin
|
Yb |
Ytterbium |
|
70 |
173.04 u |
6.97 g/cm3 |
824 °C |
1193 °C |
1878 |
de Marignac
|
Zn |
Zinc |
|
30 |
65.39 u |
7.14 g/cm3 |
419.6 °C |
907 °C |
prehistoric |
unknown
|
Zr |
Zirconium |
|
40 |
91.224 u |
6.51 g/cm3 |
1852 °C |
4377 °C |
1789 |
Klaproth
|