76Os
Osmium
Transition MetalOsmium (Os) is element 76, a transition metal, in period 6 and group 8 of the periodic table. Its standard atomic weight is 190.23, it melts at 3033 °C and boils at 5012 °C. Discovered by Smithson Tennant, 1803.
Atomic Number76
SymbolOs
NameOsmium
Atomic Weight190.23 u
CategoryTransition Metal
Period6
Group8
Melting Point3033 °C
Boiling Point5012 °C
Density22.59 g/cm³
Electron Config[Xe] 4f14 5d6 6s2
Discovered BySmithson Tennant, 1803