All chemical elements

Symbol

K

Atomic number

19

Chemical property

Alkali metal

Origin o the name

New Latin potassa, 'potash' (kalium in Latin)

Group

1

Period

4

Atomic weight (u)

39.0983

Atomic weight uncertainty (u)

0.0001

Density (g/cm³)

0.862

Melting point (K)

336.53

Boiling point (K)

1032

Heat capacity (J/(g·K))

0.757

Electro-negativity

0.82

Abundance in earth's crust (mg/kg)

20900