Flerovium

Flerovium is the superheavy element with atomic number 114, first synthesized between 1999 and 2000 through a collaboration between the Joint Institute for Nuclear Research in Dubna, Russia, and Lawrence Livermore National Laboratory in the U.S., which bombarded plutonium and curium targets with calcium ions; it is named after the nuclear physicist Georgy Flyorov. All of its isotopes have half-lives below the second scale, it does not occur in nature, and only a few atoms can be produced at a time. It has no practical uses and serves only in exploring the island of stability hypothesis.

Flerovium compounds have not yet been unambiguously synthesized or characterized. Its chemical behavior has only been inferred from single-atom surface-adsorption experiments, to test whether it is a lead-like metal or exhibits noble-gas-like inertness; it has no practical application.