Calcium vs Ruthenium

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PropertyCa CalciumRu Ruthenium
Atomic number2044
SymbolCaRu
NameCalciumRuthenium
Categoryalkaline-earth-metaltransition-metal
Standard Atomic Weight40.078 u101.07 u
Period45
Group28
Blockss
Phase at STPsolidsolid
Electron configuration[Ar]4s2[Kr]5s14d7
Oxidation states[1, 2][-4, -2, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)12.2
Electron affinity0.0245 eV1.05 eV
Density1540 kg/m³1.210000e+4 kg/m³
Melting point841.85 °C2333.85 °C
Boiling point1483.85 °C4149.85 °C
Discovery year18081828