Number of Isotopes: 3
Electron Affinity (kJ/mol): 140.9788
First Ionization Energy (kJ/mol): 1313.9
Second Ionization Energy (kJ/mol): 3388.2
Third Ionization Energy (kJ/mol): 5300.3
Electronegativity: 3.44
Polarizability (Å3): 0.793
Atomic Volume (cm3/mol): 13.9
Ionic Radius2-): 126
Ionic Radius1- (pm): No data
Atomic Radius (pm): 73
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: -2
Other Oxid. Numbers: -1, +1, +2