Livermorium (formerly ununhexium) is the synthetic superheavy element with the symbol Lv (formerly Uuh) and atomic number 116. The name was adopted by IUPAC on May 31, 2012. It is placed as the heaviest member of group 16 (VIA) although a sufficiently stable isotope is not known at this time to allow chemical experiments to confirm its position as a heavier homologue to polonium.