Carbon vs Niobium

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PropertyC CarbonNb Niobium
Atomic number641
SymbolCNb
NameCarbonNiobium
Categorynonmetaltransition-metal
Standard Atomic Weight12.0106 u92.90637 u
Period25
Group145
Blockps
Phase at STPsolidsolid
Electron configuration[He]2s22p2[Kr]5s14d4
Oxidation states[-4, -3, -2, -1, 0, 1, 2, 3, 4][-3, -1, 0, 1, 2, 3, 4, 5]
Electronegativity (Pauling)2.551.6
Electron affinity1.2621 eV0.893 eV
Density2267 kg/m³8570 kg/m³
Melting point3549.85 °C2476.85 °C
Boiling point3824.85 °C4743.85 °C
Discovery year17971801