Hextriseptium (Hts)
Hextriseptium is the systematic name of the theoretical 637ú element in the periodic table with a symbol of Hts and atomic number of 637. Hextriseptium, also known as element 637, has sé chéad tríocha a seacht protons in its nucleus, and sé chéad tríocha a seacht electrons in its shells.