Hg
Mercury
Mercury is a chemical element with the symbol Hg and atomic number 80. It has a standard atomic weight of 200.59, sits in period 6 and group 12, and is classified as a transition metal.
Properties
| Symbol | Hg |
|---|---|
| Atomic number | 80 |
| Standard atomic weight | 200.59 |
| Category | Transition metal |
| Group | 12 |
| Period | 6 |
| Electron configuration | [Xe] 4f14 5d10 6s2 |
| Outer-shell electrons | 2 |
The figure of 200.59 is a standard atomic weight.
Compounds containing mercury
1 of the compounds in this reference contain Hg, listed by the fraction of their mass it makes up.
| Compound | Formula | Atoms | % by mass |
|---|---|---|---|
| mercury chloride | ClHg | 1 | 85.0% |
Calculate with mercury
- 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 12
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.