Number of Isotopes: 6
Electron Affinity (kJ/mol): 50
First Ionization Energy (kJ/mol): 588.7
Second Ionization Energy (kJ/mol): 1151
Third Ionization Energy (kJ/mol): 2194
Electronegativity: 1.24
Polarizability (Å3): 22.7
Atomic Volume (cm3/mol): 18.5
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 176
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 103
Common Oxidation Numbers: +3
Other Oxid. Numbers: