Electronic data
Shells: 2, 8, 18, 18, 8, 2
Orbitals: [Xe] 6s2
Electronegativity: 0.9, 1.0
1. Ionization potential: 5.2117 eV
2. Ionization potential: 10.004 eV
3. Ionization potential: -- eV
Oxidation states: 2
Electrical conductivity: 0.030 10^6
Thermal data
Melting point: 725 °C
Boiling point: 1897 °C
Specific heat: 0.204 J/gK
Heat of fusion: 7.750 kJ/mol
Heat of vaporization: 142.0 kJ/mol
Thermal conductivity: 0.184 W/cmK
Steric data
Atomic radius: 2.78 Å
Ionic radius: 1.42 Å (+2)
Covalent radius: 1.98 Å
Atomic volume: 39.24 cm³/mol
Density (293 K): 3.51 g/cm³
Crystal structure: cubic body centered
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