Scandium vs Tantalum

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PropertySc ScandiumTa Tantalum
Atomic number2173
SymbolScTa
NameScandiumTantalum
Categorytransition-metaltransition-metal
Standard Atomic Weight44.955908 u180.94788 u
Period46
Group35
Blockss
Phase at STPsolidsolid
Electron configuration[Ar]4s23d1[Xe]6s24f145d3
Oxidation states[0, 1, 2, 3][-3, -1, 0, 1, 2, 3, 4, 5]
Electronegativity (Pauling)1.361.5
Electron affinity0.188 eV0.322 eV
Density2990 kg/m³1.640000e+4 kg/m³
Melting point1540.85 °C3016.85 °C
Boiling point2835.85 °C5457.85 °C
Discovery year18791802