Hexseptoctium (Hso)

Hexseptoctium is the systematic name of the theoretical 678. element in the periodic table with a symbol of Hso and atomic number of 678. Hexseptoctium, also known as element 678, has sechs­hundert­acht­und­siebzig protons in its nucleus, and sechs­hundert­acht­und­siebzig electrons in its shells.