Holmium vs Rutherfordium

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PropertyHo HolmiumRf Rutherfordium
Atomic number67104
SymbolHoRf
NameHolmiumRutherfordium
Categorylanthanidetransition-metal
Standard Atomic Weight164.93033 u263 u
Period67
GroupN/A4
Blockss
Phase at STPsolidsolid
Electron configuration[Xe]6s24f11[Rn]7s25f146d2
Oxidation states[0, 1, 2, 3][3, 4]
Electronegativity (Pauling)1.23N/A
Electron affinity0.338 eV0.65 eV
Density8800 kg/m³2.330000e+4 kg/m³
Melting point1473.85 °C2126.85 °C
Boiling point2699.85 °C5526.85 °C
Discovery year18781964