10Ne20.1797
Néon
Noble gasesBlock pPeriod 2Group 18gas at 20 °C
Configuration :[He] 2s² 2p⁶
Atomic mass :20.1797 u
English :Neon
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Modèle de Bohr · pédagogique
Electron configuration
Full1s² 2s² 2p⁶
Short[He] 2s² 2p⁶
Valence electrons8
KLMNOPQ shells
K2
L8
Electronegativity
Pauling—
Allen4.787
Mulliken (eV)—
Atomic radii
Empirical160 pm
Calculated38 pm
Covalent58 pm
Van der Waals154 pm
Successive ionisation energies
I₁2080.7 kJ/mol
I₂3952.3 kJ/mol
I₃6122 kJ/mol
I₄9371 kJ/mol
I₅12177 kJ/mol
Electron affinity—
Oxidation states
0
Bold states = most common.