Ni
Nickel
Nickel is a chemical element with the symbol Ni and atomic number 28. It has a standard atomic weight of 58.693, sits in period 4 and group 10, and is classified as a transition metal.
Properties
| Symbol | Ni |
|---|---|
| Atomic number | 28 |
| Standard atomic weight | 58.693 |
| Category | Transition metal |
| Group | 10 |
| Period | 4 |
| Electron configuration | [Ar] 3d8 4s2 |
| Outer-shell electrons | 2 |
The figure of 58.693 is a standard atomic weight.
Compounds containing nickel
1 of the compounds in this reference contain Ni, listed by the fraction of their mass it makes up.
| Compound | Formula | Atoms | % by mass |
|---|---|---|---|
| nickel sulfate | NiO4S | 1 | 37.9% |
Calculate with nickel
- 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 10
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.