Number of Isotopes: 2
Electron Affinity (kJ/mol): 14
First Ionization Energy (kJ/mol): 760
Second Ionization Energy (kJ/mol): Not applicable
Third Ionization Energy (kJ/mol): Not applicable
Electronegativity: 1.9
Polarizability (Å3): 9.7
Atomic Volume (cm3/mol): 8.9
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 137
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: +4
Other Oxid. Numbers: -3, -1, +1, +2, +3, +5, +6, +7