Ruthenium vs Rutherfordium

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PropertyRu RutheniumRf Rutherfordium
Atomic number44104
SymbolRuRf
NameRutheniumRutherfordium
Categorytransition-metaltransition-metal
Standard Atomic Weight101.07 u263 u
Period57
Group84
Blockss
Phase at STPsolidsolid
Electron configuration[Kr]5s14d7[Rn]7s25f146d2
Oxidation states[-4, -2, 1, 2, 3, 4, 5, 6, 7, 8][3, 4]
Electronegativity (Pauling)2.2N/A
Electron affinity1.05 eV0.65 eV
Density1.210000e+4 kg/m³2.330000e+4 kg/m³
Melting point2333.85 °C2126.85 °C
Boiling point4149.85 °C5526.85 °C
Discovery year18281964