Nb
Niobium
Niobium is a chemical element with the symbol Nb and atomic number 41. It has a standard atomic weight of 92.906, sits in period 5 and group 5, and is classified as a transition metal.
Properties
| Symbol | Nb |
|---|---|
| Atomic number | 41 |
| Standard atomic weight | 92.906 |
| Category | Transition metal |
| Group | 5 |
| Period | 5 |
| Electron configuration | [Kr] 4d4 5s1 |
| Outer-shell electrons | 2 |
The figure of 92.906 is a standard atomic weight.
Calculate with niobium
- Molar mass of any formula containing it
- Electron configuration, including ions
- Effective nuclear charge by Slater's rules
- Average atomic mass from isotope abundances
Group 5
Atomic weights are the IUPAC 2021 standard values, abridged to the conventional five significant figures. Group, period, category and electron configuration are derived from the atomic number rather than stored, so they cannot drift out of step with it.