80Hg200.59
Mercury (Hg)
Element 80 · Transition metal
Mercury (Hg) is a chemical element with atomic number 80. It is classified as a transition metal in period 6, group 12 of the periodic table (the d-block). Its standard atomic weight is 200.59 u and its ground-state electron configuration is [Xe] 4f¹⁴ 5d¹⁰ 6s².
Mercury facts
| Atomic number (Z) | 80 |
|---|---|
| Symbol | Hg |
| Standard atomic weight | 200.59 u |
| Category | Transition metal |
| Group | 12 |
| Period | 6 |
| Block | d-block |
| Electron configuration | [Xe] 4f¹⁴ 5d¹⁰ 6s² |
| Electronegativity (Pauling) | 2.0 |
| State at 20 °C | Liquid |
| Protons / electrons | 80 / 80 |
| Neutrons (most common isotope, approx.) | 121 |
| Molar mass | 200.59 g/mol |