Number of Isotopes: 8
Electron Affinity (kJ/mol):  
First Ionization Energy (kJ/mol): 867.7
Second Ionization Energy (kJ/mol): 1631.4
Third Ionization Energy (kJ/mol): 3616.2
Electronegativity: 1.69
Polarizability (Å3): 7.2
Atomic Volume (cm3/mol): 13
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 151
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): 109
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: +2
Other Oxid. Numbers: