Ruthenium vs Rhodium

← Back to Periodic Table
PropertyRu RutheniumRh Rhodium
Atomic number4445
SymbolRuRh
NameRutheniumRhodium
Categorytransition-metaltransition-metal
Standard Atomic Weight101.07 u102.9055 u
Period55
Group89
Blockss
Phase at STPsolidsolid
Electron configuration[Kr]5s14d7[Kr]5s14d8
Oxidation states[-4, -2, 1, 2, 3, 4, 5, 6, 7, 8][-3, -1, 1, 2, 3, 4, 5, 6, 7]
Electronegativity (Pauling)2.22.28
Electron affinity1.05 eV1.137 eV
Density1.210000e+4 kg/m³1.240000e+4 kg/m³
Melting point2333.85 °C1963.85 °C
Boiling point4149.85 °C3694.85 °C
Discovery year18281803