Number of Isotopes: 2
Electron Affinity (kJ/mol): 20
First Ionization Energy (kJ/mol): 589.4
Second Ionization Energy (kJ/mol): 1971
Third Ionization Energy (kJ/mol): 2878
Electronegativity: 1.83
Polarizability (Å3): 7.6
Atomic Volume (cm3/mol): 17.2
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 170
Ionic Radius1+ (pm): 164
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 102.5
Common Oxidation Numbers: +1, +3
Other Oxid. Numbers: