Germanium vs Niobium

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PropertyGe GermaniumNb Niobium
Atomic number3241
SymbolGeNb
NameGermaniumNiobium
Categorymetalloidtransition-metal
Standard Atomic Weight72.63 u92.90637 u
Period45
Group145
Blockps
Phase at STPsolidsolid
Electron configuration[Ar]4s23d104p2[Kr]5s14d4
Oxidation states[-4, -3, -2, -1, 0, 1, 2, 3, 4][-3, -1, 0, 1, 2, 3, 4, 5]
Electronegativity (Pauling)2.011.6
Electron affinity1.232 eV0.893 eV
Density5323.4 kg/m³8570 kg/m³
Melting point938.25 °C2476.85 °C
Boiling point2832.85 °C4743.85 °C
Discovery year18861801