Holmium vs Tantalum

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PropertyHo HolmiumTa Tantalum
Atomic number6773
SymbolHoTa
NameHolmiumTantalum
Categorylanthanidetransition-metal
Standard Atomic Weight164.93033 u180.94788 u
Period66
GroupN/A5
Blockss
Phase at STPsolidsolid
Electron configuration[Xe]6s24f11[Xe]6s24f145d3
Oxidation states[0, 1, 2, 3][-3, -1, 0, 1, 2, 3, 4, 5]
Electronegativity (Pauling)1.231.5
Electron affinity0.338 eV0.322 eV
Density8800 kg/m³1.640000e+4 kg/m³
Melting point1473.85 °C3016.85 °C
Boiling point2699.85 °C5457.85 °C
Discovery year18781802