Symbol	K	Atomic radius: pm	227	Fusion: kJ/Mole	2.33
Name	Potassium	Ionic radius: pm	(+1)151	Boiling point: °C	759
Atomic number	19	Electron affinity	0.50	Melting point: °C	64
Atomic weight	39.10	1st  ion potential	4.34	Specific Heat Cap: J/(g K)	0.76
Classification	Alkali metal	Natural form	Solid	Thermal Cond: W/(cm K)	1.03
Configuration	[Ar]4s1	Crystal structure	BCC	Electrical Cond	0.139
Oxidation states	1	Density	0.89	Abundance: mg/kg-crust	20,900
Electronegativity	0.82	Vaporization: kJ/Mole	77.5
Potassium was the first metal to be isolated by electrolysis, by Sir Humphrey Davy, when he discovered the element in 1807.			Uses - fertilizer, low sodium salt, glass, soap, detergents, fireworks