Au
Gold
Gold is a chemical element with the symbol Au and atomic number 79. It has a standard atomic weight of 196.97, sits in period 6 and group 11, and is classified as a transition metal.
Properties
| Symbol | Au |
|---|---|
| Atomic number | 79 |
| Standard atomic weight | 196.97 |
| Category | Transition metal |
| Group | 11 |
| Period | 6 |
| Electron configuration | [Xe] 4f14 5d10 6s1 |
| Outer-shell electrons | 2 |
The figure of 196.97 is a standard atomic weight.
Calculate with gold
- 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 11
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.