Arsenic vs Ruthenium

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PropertyAs ArsenicRu Ruthenium
Atomic number3344
SymbolAsRu
NameArsenicRuthenium
Categorymetalloidtransition-metal
Standard Atomic Weight74.921595 u101.07 u
Period45
Group158
Blockps
Phase at STPsolidsolid
Electron configuration[Ar]4s23d104p3[Kr]5s14d7
Oxidation states[-3, -2, -1, 0, 1, 2, 3, 4, 5][-4, -2, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)2.182.2
Electron affinity0.81 eV1.05 eV
Density5776 kg/m³1.210000e+4 kg/m³
Melting point816.85 °C2333.85 °C
Boiling point613.85 °C4149.85 °C
Discovery year12501828