Periodic Table
10
Ne
20.18
Neon
Noble GasInert noble gas; bright red-orange glow in discharge tubes.
Electronic Configuration
1s² 2s² 2p⁶or1s² 2s² 2p⁶
Electron shells
2e⁻n=1
8e⁻n=2
Properties
Atomic number
10
Atomic mass
20.18 u
Category
Noble Gas
Block / Group / Period
p · 18 · 2
Valence electrons
8
Oxidation states
0
Electronegativity
—
Atomic radius
38 pm
Ionization energy
2081 kJ/mol
Electron affinity
0 kJ/mol
Melting point
25 K / -248 °C
Boiling point
27 K / -246 °C
Density
0.0009 g/cm³
State at 25 °C
gas
Personal Notes
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