Osmium
Elemental State Os
Electron Configuration 1s22s22p63s23p63d104s24p64d104f145s25p66s25d6
First Ionization Potential 8.438 eV
Electron Affinity 1.1 eV (calculated)
Z*  
Pauling Electronegativity 2.2
Covalent Radius 1.28 Å
Metallic Radius 1.35 Å
Ionic Radius 0.770 Å Os4+ coordination number = 6
van der Waal's Radius  
Melting Point 3033 oC
Boiling Point 5012 oC
Density 22.57 g/cm3
Other Properties