Number of Isotopes: 2
Electron Affinity (kJ/mol): 50
First Ionization Energy (kJ/mol): 523.6
Second Ionization Energy (kJ/mol): 1340
Third Ionization Energy (kJ/mol): 2022
Electronegativity: 1.27
Polarizability (Å3): 21.9
Atomic Volume (cm3/mol): 17.8
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 174
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 100.1
Common Oxidation Numbers: +3
Other Oxid. Numbers: