Neon

Noble gas · 20.180 u · group 18, period 2

Neon · Ne

Atomic number10

SymbolNe

CategoryNoble gas

Standard stateGas

Group · Period · Block18 · 2 · p

Electron configuration[He]2s2 2p6

Atomic mass20.180 u

Atomic radius154 pm

Protons / Neutrons / Electrons10 / 10 / 10

Shells (e⁻ per shell)2, 8

Electronegativity (Pauling)—

Ionization energy21.565 eV

Electron affinity—

Oxidation states0

Melting point24.6 K · -248.6 °C

Boiling point27.1 K · -246.1 °C

Density9.00e-4 g/cm³

Year discovered1898

CPK color

#B3E3F5

State at room temp (25 °C)

gas

Position