Electronic data
Shells: 2, 2
Orbitals: [He] 2s2
Electronegativity: 1.5, 1.5
1. Ionization potential: 9.3226 eV
2. Ionization potential: 18.211 eV
3. Ionization potential: 153.893 eV
Oxidation states: 2
Electrical conductivity: 0.313 10^6
Thermal data
Melting point: 1287 °C
Boiling point: 2472 °C
Specific heat: 1.82 J/gK
Heat of fusion: 12.20 kJ/mol
Heat of vaporization: 292.40 kJ/mol
Thermal conductivity: 2.00 W/cmK
Steric data
Atomic radius: 1.40 Å
Ionic radius: 0.45 Å (+2)
Covalent radius: 0.90 Å
Atomic volume: 5.0 cm³/mol
Density (293 K): 1.848 g/cm³
Crystal structure: hexagonal
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