Yttrium vs Ruthenium

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PropertyY YttriumRu Ruthenium
Atomic number3944
SymbolYRu
NameYttriumRuthenium
Categorytransition-metaltransition-metal
Standard Atomic Weight88.90584 u101.07 u
Period55
Group38
Blockss
Phase at STPsolidsolid
Electron configuration[Kr]5s24d1[Kr]5s14d7
Oxidation states[0, 1, 2, 3][-4, -2, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)1.222.2
Electron affinity0.307 eV1.05 eV
Density4470 kg/m³1.210000e+4 kg/m³
Melting point1521.85 °C2333.85 °C
Boiling point3344.85 °C4149.85 °C
Discovery year17941828