19

K

Potassium

39.098

Alkali Metal
Solid

Discovery

Davy, Humphry (1807)

Etymology

Latin via Arabic

Meaning

Calcined ashes

Electron configuration

Electron configuration

Crystal structure

Crystal structure

Body-centered cubic

Physical Properties

Phase

  (at 21 °C and 101.325 kPa)

Solid

Melting point

  (at 101.325 kPa)

64.0 °C

337.15 K

Boiling point

  (at 101.325 kPa)

760.0 °C

1033.15 K

Density

  (at 21 °C and 101.325 kPa)

1.78 g/cm3

Electronegativity

0.82