has last electron in has electron shell has valence electron has quality electron atom radioactive quality electron shell p subshell flerovium atom 7 4 flerovio Fl flerovium flerovium flerovio https://en.wikipedia.org/wiki/Flerovium Flerovium is a superheavy artificial chemical element with the symbol Fl and atomic number 114. It is an extremely radioactive synthetic element. The element is named after the Flerov Laboratory of Nuclear Reactions of the Joint Institute for Nuclear Research in Dubna, Russia, where the element was discovered in 1998. Flerovium 钅夫