Electronic data
Shells: 2, 8, 2
Orbitals: [Ne] 3s2
Electronegativity: 1.2, 1.2
1. Ionization potential: 7.6462 eV
2. Ionization potential: 15.035 eV
3. Ionization potential: 80.143 eV
Oxidation states: 2
Electrical conductivity: 0.226 10^6
Thermal data
Melting point: 648.8 °C
Boiling point: 1090 °C
Specific heat: 1.02 J/gK
Heat of fusion: 8.954 kJ/mol
Heat of vaporization: 127.40 kJ/mol
Thermal conductivity: 1.56 W/cmK
Steric data
Atomic radius: 1.72 Å
Ionic radius: 0.72 Å (+2)
Covalent radius: 1.36 Å
Atomic volume: 13.97 cm³/mol
Density (293 K): 1.738 g/cm³
Crystal structure: hexagonal
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