Flerovium (Fl): electron configuration, atomic mass and facts
Flerovium (Fl) is element 114 of the periodic table, a post-transition metal (predicted) in period 7, group 14. Its electron configuration is [Rn] 5f14 6d10 7s2 7p2, with electrons arranged in shells 2, 8, 18, 32, 32, 18, 4, and its most stable isotope has mass number 289.
▶ Watch Flerovium’s electrons orbit in the interactive periodic tableFlerovium at a glance
| Symbol | Fl |
|---|---|
| Atomic number | 114 |
| Atomic mass | [289] u (most stable isotope) |
| Category | Post-transition metal (predicted) |
| Group | 14 |
| Period | 7 |
| Block | p-block |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p2 |
| Noble-gas shorthand | [Rn] 5f14 6d10 7s2 7p2 |
| Electrons per shell | 2, 8, 18, 32, 32, 18, 4 |
| Outer-shell electrons | 4 |
| Electronegativity (Pauling) | — |
| State at 20 °C | Unknown (only a few atoms made) |
Where is Flerovium on the periodic table?
Flerovium is in period 7, group 14, in the p-block. The period number matches its 7 electron shells, and the block names the subshell its last electrons fill. In the same group, Lead sits directly above it. Elements in one group have the same number of outer-shell electrons (4 here), which is why they react in similar ways.
How to work out the electron configuration of Flerovium
Put 114 electrons into subshells in order of rising energy, filling each before starting the next: 1s² (2), 2s² (4), 2p⁶ (10), 3s² (12), 3p⁶ (18), 4s² (20), 3d¹⁰ (30), 4p⁶ (36), 5s² (38), 4d¹⁰ (48), 5p⁶ (54), 6s² (56), 4f¹⁴ (70), 5d¹⁰ (80), 6p⁶ (86), 7s² (88), 5f¹⁴ (102), 6d¹⁰ (112), 7p² (114). In shorthand, [Rn] stands for the 86 electrons of radon, giving [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p².
Frequently asked questions
What is the electron configuration of Flerovium?
The electron configuration of Flerovium (Fl) is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p2. In noble-gas shorthand it is written [Rn] 5f14 6d10 7s2 7p2.
How many electrons does Flerovium have in each shell?
Flerovium has 114 electrons arranged in shells as 2, 8, 18, 32, 32, 18, 4. It has 4 electrons in its outer shell.
What is the atomic mass of Flerovium?
Flerovium has no stable isotopes. Its most stable isotope has a mass number of 289.
Is Flerovium a metal?
Yes. Flerovium is a post-transition metal (predicted).
Explore nearby elements
More post-transition metals: Lead, Bismuth, Polonium, Nihonium, Moscovium, Livermorium. See all elements on the periodic table.