The heaviest element that is believed to have been synthesized to date is element 118, oganesson, on 9 October 2006, by the Flerov Laboratory of Nuclear Reactions in Dubna, Russia.
Unsur terberat yang diyakini telah disintesis hingga saat ini adalah unsur 118, oganeson, pada 9 Oktober 2006, oleh Flerov Laboratory of Nuclear Reactions di Dubna, Rusia.