Hextrihexium (Hth)
Hextrihexium is the systematic name of the theoretical 636ú element in the periodic table with a symbol of Hth and atomic number of 636. Hextrihexium, also known as element 636, has sé chéad tríocha a sé protons in its nucleus, and sé chéad tríocha a sé electrons in its shells.