Tungsten vs Iridium

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PropertyW TungstenIr Iridium
Atomic number7477
SymbolWIr
NameTungstenIridium
Categorytransition-metaltransition-metal
Standard Atomic Weight183.84 u192.217 u
Period66
Group69
Blockss
Phase at STPsolidsolid
Electron configuration[Xe]6s24f145d4[Xe]6s24f145d7
Oxidation states[-4, -2, -1, 0, 1, 2, 3, 4, 5, 6][-3, -2, -1, 1, 2, 3, 4, 5, 6, 7, 8, 9]
Electronegativity (Pauling)2.362.2
Electron affinity0.815 eV1.565 eV
Density1.930000e+4 kg/m³2.256220e+4 kg/m³
Melting point3421.85 °C2445.85 °C
Boiling point5554.85 °C4427.85 °C
Discovery year17811803