Livermorium (Lv) — element 116post-transition metal · group 16, period 7
Livermorium is a chemical element with the symbol Lv and atomic number 116. It is a post-transition metal in group 16, period 7 of the periodic table (the p-block), with a standard atomic mass of [293] u. At room temperature (25 °C) livermorium is predicted to be a solid.
# Livermorium properties
| Symbol | Lv |
|---|---|
| Atomic number | 116 |
| Atomic mass | [293] u |
| Category | post-transition metal |
| Group | 16 |
| Period | 7 |
| Block | p-block |
| Electron configuration | [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴ |
| Full configuration | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d¹⁰ 7s² 7p⁴ |
| Electrons per shell | 2, 8, 18, 32, 32, 18, 6 |
| Protons / electrons | 116 / 116 |
| State at 25 °C | predicted solid |
| Melting point | 709 K (435.9 °C, 816.5 °F) (predicted) |
| Boiling point | 1085 K (811.9 °C, 1493.3 °F) (predicted) |
| Density | 12.9 g/cm³ (predicted) |
| Electronegativity (Pauling) | — |
| First ionization energy | — |
| Atomic radius | — |
| Discovered | 2000 |
Values for superheavy elements are theoretical predictions; none have been measured in bulk.
# Electron configuration of livermorium
The electron configuration of livermorium is [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴, written out in full as 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d¹⁰ 7s² 7p⁴. Its 116 electrons fill 7 shells as 2, 8, 18, 32, 32, 18, 6, so the outermost shell holds 6 electrons. As a group 16 element, livermorium has 6 valence electrons. Because only a few atoms have ever been made, this configuration is a theoretical prediction.