Nickel vs Ruthenium

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PropertyNi NickelRu Ruthenium
Atomic number2844
SymbolNiRu
NameNickelRuthenium
Categorytransition-metaltransition-metal
Standard Atomic Weight58.6934 u101.07 u
Period45
Group108
Blockss
Phase at STPsolidsolid
Electron configuration[Ar]4s23d8[Kr]5s14d7
Oxidation states[-2, -1, 0, 1, 2, 3, 4][-4, -2, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)1.912.2
Electron affinity1.156 eV1.05 eV
Density8912 kg/m³1.210000e+4 kg/m³
Melting point1454.85 °C2333.85 °C
Boiling point2912.85 °C4149.85 °C
Discovery year17511828