114Fl[289]
Flerovium (Fl)
Element 114 · Post-transition metal
Flerovium (Fl) is a chemical element with atomic number 114. It is classified as a post-transition metal in period 7, group 14 of the periodic table (the p-block). Its most stable known isotope has mass number 289 and its ground-state electron configuration is [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p². Its properties are largely predicted, as only a few atoms have ever been produced.
Flerovium facts
| Atomic number (Z) | 114 |
|---|---|
| Symbol | Fl |
| Mass number of most stable isotope | [289] |
| Category | Post-transition metal |
| Group | 14 |
| Period | 7 |
| Block | p-block |
| Electron configuration | [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p² |
| Electronegativity (Pauling) | — |
| State at 20 °C | Unknown (synthetic) |
| Protons / electrons | 114 / 114 |
| Neutrons (most common isotope, approx.) | 175 |
| Molar mass | 289 g/mol |