Element 41

Niobium (Nb)

41

Nb

niobium

Metal · d block · group 5, period 5

Electron configuration: $[\mathrm{Kr}]\,5s^{1}\,4d^{4}$
Unpaired electrons: 5 (paramagnetic)
Molar mass: 92.906 g/mol
Electronegativity: 1.6
Atomic radius: 146 pm
First ionization energy: 652 kJ/mol
Next ionization energies: 1,380, 2,416
Electron affinity: 86 kJ/mol released

Practice

Practice niobium

No course questions are about niobium specifically, but these lessons cover what you need.

Where it comes up in the course