Electronic data
Shells: 2, 6
Orbitals: [He] 2s2 2p4
Electronegativity: 3.5, 3.5
1. Ionization potential: 13.6181 eV
2. Ionization potential: 35.117 eV
3. Ionization potential: 54.934 eV
Oxidation states: -2, -1
Electrical conductivity: --
Thermal data
Melting point: -218.4 °C
Boiling point: -182.962 °C
Specific heat: 0.92 J/gK
Heat of fusion: 0.22259 kJ/mol
Heat of vaporization: 3.4099 kJ/mol
Thermal conductivity: 0.0002674 W/cmK
Steric data
Atomic radius: 0.65 Å
Ionic radius: 1.40 Å (-2)
Covalent radius: 0.73 Å
Atomic volume: 14.0 cm³/mol
Density (293 K): 0.001429 g/cm³
Crystal structure: cubic
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