77Ir
Iridium
Transition MetalIridium (Ir) is element 77, a transition metal, in period 6 and group 9 of the periodic table. Its standard atomic weight is 192.217, it melts at 2446 °C and boils at 4428 °C. Discovered by Smithson Tennant, 1803.
Atomic Number77
SymbolIr
NameIridium
Atomic Weight192.217 u
CategoryTransition Metal
Period6
Group9
Melting Point2446 °C
Boiling Point4428 °C
Density22.56 g/cm³
Electron Config[Xe] 4f14 5d7 6s2
Discovered BySmithson Tennant, 1803