Hexseptennium (Hse)

Hexseptennium is the systematic name of the theoretical 679. element in the periodic table with a symbol of Hse and atomic number of 679. Hexseptennium, also known as element 679, has seks­hundrað­og­sjeyti­níggju protons in its nucleus, and seks­hundrað­og­sjeyti­níggju electrons in its shells.