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Pòtásíọ̀mù, ₁₉K
	Potassium pearls (in paraffin oil, ~5 mm each)
Pòtásíọ̀mù
Pípè	/pəˈtæsiəm/ (pə-TAS-ee-əm)
Ìhànsójú	silvery gray
Ìwúwo átọ̀mù Ar, std(K)	39.0983(1)
Pòtásíọ̀mù ní orí tábìlì àyè
	árgọ̀nù ← pòtásíọ̀mù → calcium
Nọ́mbà átọ̀mù (Z)	19
Ẹgbẹ́	group 1: H and alkali metals
Àyè	àyè 4
Àdìpọ̀	Àdìpọ̀-s
Ẹ̀ka ẹ́límẹ́ntì	Alkali metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Ar] 4s1
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 8, 1
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	336.7 K (63.5 °C, 146.3 °F)
Ígbà ìhó	1032 K (759 °C, 1398 °F)
Kíki (near r.t.)	0.862 g/cm3
when liquid (at m.p.)	0.828 g/cm3
Critical point	2223 K, 16 MPa
Heat of fusion	2.33 kJ/mol
Heat of	76.9 kJ/mol
Molar heat capacity	29.6 J/(mol·K)
Atomic properties
Oxidation states	−1, +1 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 0.82
energies	(more);
Atomic radius	empirical: 227 pm
Covalent radius	203±12 pm
Van der Waals radius	275 pm
	Color lines in a spectral rangeSpectral lines of pòtásíọ̀mù
Other properties
Natural occurrence	primordial
Crystal structure	(bcc)
Speed of sound thin rod	2000 m/s (at 20 °C)
Thermal expansion	83.3 µm/(m·K) (at 25 °C)
Thermal conductivity	102.5 W/(m·K)
Electrical resistivity	72 n Ω·m (at 20 °C)
Magnetic ordering	paramagnetic
Young's modulus	3.53 GPa
Shear modulus	1.3 GPa
Bulk modulus	3.1 GPa
Mohs hardness	0.4
Brinell hardness	0.363 MPa
CAS Number	7440-09-7
History
Discovery	Humphry Davy (1807)
First isolation	Humphry Davy (1807)
Main isotopes of pòtásíọ̀mù
	Àdàkọ:Category-inline; wo; ọ̀rọ̀; àtúnṣe; \| references

Pòtásíọ̀mù je elimenti kemika kan to ni ami-idamo K (latinu ede Latini Tuntun fun kalium) ati nomba atomu 19. Potasiomu je metali alkali alawo fadaka-funfun didelowo to undi oksidi kiakia ninu afefe to si yirapo mo omi gigdigidi, eyi unfa igbona jade to sana si haidrojin to unbujade ninu iyirapo na, o si unjo bi awo lilaki.

Nitoripe potasiomu ati sodiomu jora ni isese kemika won, awon iyọ̀ won ko se e ya sira won nibere. O di odun 1702 ko to di pe won fun ra pe opo elimenti wa ninu awon iyo won,^[4] eyi je mimufidaju ni odun 1807 nigba ti potasiomu ati sodiomu je yiya sotooto latinu awon iyọ̀ otooto pelu elektrolisisi. Potasiomu inu adaye wa ninu awon iyọ̀ oniioni nikan. Nitori eyi, o wa ninu omi okun (to je 0.04% potasiomu pelu iwuwo^[5]^[6]), o si je apa opo awon alumoni.