Radon

Noble gas · 222.01758 u · group 18, period 6

Radon · Rn

Atomic number86

SymbolRn

CategoryNoble gas

Standard stateGas

Group · Period · Block18 · 6 · p

Electron configuration[Xe]6s2 4f14 5d10 6p6

Atomic mass222.01758 u

Atomic radius220 pm

Protons / Neutrons / Electrons86 / 136 / 86

Shells (e⁻ per shell)2, 8, 18, 32, 18, 8

Electronegativity (Pauling)—

Ionization energy10.745 eV

Electron affinity—

Oxidation states0

Melting point202 K · -71.1 °C

Boiling point211.4 K · -61.7 °C

Density0.0097 g/cm³

Year discovered1900

CPK color

#428296

State at room temp (25 °C)

gas

Position