Promethium
Elemental State Pm
Electron Configuration 1s22s22p63s23p63d104s24p64d105s25p66s24f5
First Ionization Potential 5.58 eV
Electron Affinity  
Z*  
Pauling Electronegativity   
Covalent Radius  
Metallic Radius   
Ionic Radius   
van der Waal's Radius   
Melting Point 1042 oC
Boiling Point ~3000 oC
Density 7.264 g/cm3
Other Properties Man made; all isotopes are radioactive

145Pm half-life = 17.7 years