10 Ne

Noble gas

Neon

Glows red-orange in discharge tubes.

See it in the interactive periodic table

Properties of Neon

Atomic number (Z)
10
Symbol
Ne
Atomic mass
20.18 g/mol
Category
Noble gas
Group
18
Period
2
Electron configuration
[He] 2s² 2p⁶
Electronegativity (Pauling)
Atomic radius
38 pm
First ionization energy
2081 kJ/mol
Melting point
24.56 K (-248.6 °C)
Boiling point
27.07 K (-246.1 °C)
Density
0.0008999 g/cm³
Phase at 25 °C
Gas
Discovered
Discovered in 1898
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