Potassium (K)

A silvery-white metal that is soft enough to be cut with a knife.

Bananas are rich in potassium.

Element properties

Atomic number
19
Symbol
K
Atomic mass
39.098 u
Category
Alkali Metal
Period
4
Group
1
Block
s
State
Solid
Electron configuration
[Ar] 4s1
Electronegativity (Pauling)
0.82
Density
0.862 g/cm³
Melting point
63.5 °C
Boiling point
759 °C

Uses