Hexoctennium (Hoe)
Hexoctennium is the systematic name of the theoretical 689. element in the periodic table with a symbol of Hoe and atomic number of 689. Hexoctennium, also known as element 689, has kuusisataakahdeksankymmentäyhdeksän protons in its nucleus, and kuusisataakahdeksankymmentäyhdeksän electrons in its shells.