Atomic number 76
Name Osmium
Atomic mass 190.23(3)
Electronic configuration [Xe] 4f14 5d6 6s2
Electronegativity 2.2
Atomic radius 128 pm
Ion radius 63 (+4) pm
Van der Waals radius pm
Ionization energy 840 kJ/mol
Electron affinity -106 kJ/mol
Oxidation states -2, -1, 1, 2, 3, 4, 5, 6, 7, 8
Standard physical state solid
Bonding type metallic
Melting point 3306 °C
Boiling point 5285 °C
Density 22.61 g/cm³
Type transition metal
Year discovered 1803