41
Nb
Niobium
Transition metal period 5 group 5 d-block discovered: 1801
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 41
- Atomic mass
- 92.90637 a.m.u.
- Electron configuration
- [Kr]5s1 4d4
- Electronegativity
- 1.6 on the Pauling scale
- Atomic radius
- 207 pm
- Ionization energy
- 6.759 eV
- Electron affinity
- 0.893 eV
- Oxidation states
- +5, +3
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 2750 K (2 476,85 °C)
- Boiling point
- 5017 K (4 743,85 °C)
- Density
- 8.57 g/cm³