Number of Isotopes: 3
Electron Affinity (kJ/mol): 133.6
First Ionization Energy (kJ/mol): 786.4
Second Ionization Energy (kJ/mol): 1577
Third Ionization Energy (kJ/mol): 3231.5
Electronegativity: 1.9
Polarizability (Å3): 5.4
Atomic Volume (cm3/mol): 12
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 117.6
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: -4, +4
Other Oxid. Numbers: -3, -2, -1, +1, +2, +3