Nickel vs Osmium

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PropertyNi NickelOs Osmium
Atomic number2876
SymbolNiOs
NameNickelOsmium
Categorytransition-metaltransition-metal
Standard Atomic Weight58.6934 u190.23 u
Period46
Group108
Blockss
Phase at STPsolidsolid
Electron configuration[Ar]4s23d8[Xe]6s24f145d6
Oxidation states[-2, -1, 0, 1, 2, 3, 4][-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)1.912.2
Electron affinity1.156 eV1.1 eV
Density8912 kg/m³2.258720e+4 kg/m³
Melting point1454.85 °C3032.85 °C
Boiling point2912.85 °C5011.85 °C
Discovery year17511803