Seaborgium
Element 106 · Transition Metal
Seaborgium is the group 6 transactinide, expected to behave like tungsten. Gas-phase experiments with single atoms show it forms a volatile oxide and oxychloride consistent with the +6 state, confirming periodic-table placement. Its longest-lived isotope has a half-life of a few minutes. Properties are predicted, with limited experimental data. Seaborgium is radioactive, with known isotopes decaying within minutes.
Key facts
| Atomic number | 106 |
|---|---|
| Atomic weight | [269] |
| Category | Transition Metal |
| Group / Period | 6 / 7 |
| Block | d |
| Electron configuration | [Rn] 5f14 6d4 7s2 |
| Common oxidation states | +6 (predicted) |
| State at STP | Solid |
Occurrence
Seaborgium is entirely synthetic, made by fusing californium-249 with oxygen-18 or similar reactions in accelerators.
Applications
Gas-phase chemistry of superheavy elements
Validation of periodic trends at high atomic number
No commercial applications
Common compounds
- Seaborgium hexacarbonyl (Sg(CO)6, observed)
- Seaborgium oxychloride (SgO2Cl2, predicted)
Seaborgium was the first element named after a living person, honoring Glenn Seaborg, discoverer of ten transuranium elements.
Data source: IUPAC standard atomic weights 2021