Name: Osmium
Symbol: Os
Atomic Number: 76
AtomicWeight: 190.230000
Family: transition metals
CAS RN: 7440-04-2
Description: A bluish white, extremely hard, and brittle metal, a member of the platinum group
State (25 °C): Solid
Melting Point: 3306 °K
Boiling Point: 5285 °K
Density: 22.61 g/cm³
Oxidation states: +3,+4
Electron Configuration: [Xe] 4f¹⁴5d⁶6s²
Radius: 130 pm (Covalent)
Electronegativity: 2.2 (Pauling Scale)

1st Ionization Energy: 840 KJ/mole
2nd Ionization Energy: 1600 KJ/mole
3rd Ionization Energy: KJ/mole