Seaborgium

Seaborgium is the superheavy element with atomic number 106, synthesized in 1974 by a Berkeley team that bombarded a californium target with oxygen ions; it is named after the nuclear chemist Glenn T. Seaborg. All of its isotopes have half-lives of only a few seconds to a few minutes, it does not occur in nature, and only a few atoms are obtained in each synthesis. It has no industrial or civilian uses and serves only in basic research on the chemical properties of superheavy elements.

Seaborgium compounds such as seaborgium oxychloride (SgO2Cl2) and its oxyhydroxides have only been briefly measured in single-atom gas-phase chemistry experiments, to verify whether it behaves like tungsten and molybdenum; they have never been separated or weighed in macroscopic quantities and have no practical application.