37

Rb

Rubidium

85.468

Alkali Metal
Solid

Discovery

Bunsen, Robert Wilhelm & Kirchhoff, Gustav Robert (1861)

Etymology

Latin

Meaning

Deepest red

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)

39.0 °C

312.15 K

Boiling point

  (at 101.325 kPa)

-153.0 °C

120.15 K

Density

  (at 21 °C and 101.325 kPa)

1.63 g/cm3

Electronegativity

0.82