Palladium vs Iridium

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PropertyPd PalladiumIr Iridium
Atomic number4677
SymbolPdIr
NamePalladiumIridium
Categorytransition-metaltransition-metal
Standard Atomic Weight106.42 u192.217 u
Period56
Group109
Blockds
Phase at STPsolidsolid
Electron configuration[Kr]4d10[Xe]6s24f145d7
Oxidation states[1, 2, 3, 4, 5][-3, -2, -1, 1, 2, 3, 4, 5, 6, 7, 8, 9]
Electronegativity (Pauling)2.22.2
Electron affinity0.557 eV1.565 eV
Density1.200000e+4 kg/m³2.256220e+4 kg/m³
Melting point1554.9 °C2445.85 °C
Boiling point2962.85 °C4427.85 °C
Discovery year18031803