Xenon

Noble gas · 131.29 u · group 18, period 5

Xenon · Xe

Atomic number54

SymbolXe

CategoryNoble gas

Standard stateGas

Group · Period · Block18 · 5 · p

Electron configuration[Kr]5s2 4d10 5p6

Atomic mass131.29 u

Atomic radius216 pm

Protons / Neutrons / Electrons54 / 77 / 54

Shells (e⁻ per shell)2, 8, 18, 18, 8

Electronegativity (Pauling)2.6

Ionization energy12.13 eV

Electron affinity—

Oxidation states0

Melting point161.4 K · -111.8 °C

Boiling point165 K · -108.1 °C

Density0.0059 g/cm³

Year discovered1898

CPK color

#429EB0

State at room temp (25 °C)

gas

Position

3 in library