Aluminum vs Niobium

← Back to Periodic Table
PropertyAl AluminumNb Niobium
Atomic number1341
SymbolAlNb
NameAluminumNiobium
Categorypost-transition-metaltransition-metal
Standard Atomic Weight26.981538 u92.90637 u
Period35
Group135
Blockps
Phase at STPsolidsolid
Electron configuration[Ne]3s23p1[Kr]5s14d4
Oxidation states[-2, -1, 0, 1, 2, 3][-3, -1, 0, 1, 2, 3, 4, 5]
Electronegativity (Pauling)1.611.6
Electron affinity0.4328 eV0.893 eV
Density2700 kg/m³8570 kg/m³
Melting point660.287 °C2476.85 °C
Boiling point2518.85 °C4743.85 °C
Discovery year18251801