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 šesť­sto sedemdesiat­osem protons in its nucleus, and šesť­sto sedemdesiat­osem electrons in its shells.