Molybdenum vs Rutherfordium

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PropertyMo MolybdenumRf Rutherfordium
Atomic number42104
SymbolMoRf
NameMolybdenumRutherfordium
Categorytransition-metaltransition-metal
Standard Atomic Weight95.95 u263 u
Period57
Group64
Blockss
Phase at STPsolidsolid
Electron configuration[Kr]5s14d5[Rn]7s25f146d2
Oxidation states[-4, -2, -1, 0, 1, 2, 3, 4, 5, 6][3, 4]
Electronegativity (Pauling)2.16N/A
Electron affinity0.744 eV0.65 eV
Density1.020000e+4 kg/m³2.330000e+4 kg/m³
Melting point2622.85 °C2126.85 °C
Boiling point4638.85 °C5526.85 °C
Discovery year17781964