Electronic data
Shells: 2, 8, 18, 8, 1
Orbitals: [Kr] 5s1
Electronegativity: 0.8, 0.9
1. Ionization potential: 4.1771 eV
2. Ionization potential: 27.28 eV
3. Ionization potential: 40.0 eV
Oxidation states: 1
Electrical conductivity: 0.0779 10^6
Thermal data
Melting point: 38.89 °C
Boiling point: 686 °C
Specific heat: 0.363 J/gK
Heat of fusion: 2.192 kJ/mol
Heat of vaporization: 72.216 kJ/mol
Thermal conductivity: 0.582 W/cmK
Steric data
Atomic radius: 2.98 Å
Ionic radius: 1.61 Å (+1)
Covalent radius: 2.16 Å
Atomic volume: 55.9 cm³/mol
Density (293 K): 1.53 g/cm³
Crystal structure: cubic body centered
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