Hexhexnilium (Hhn)

Hexhexnilium is the systematic name of the theoretical 660. element in the periodic table with a symbol of Hhn and atomic number of 660. Hexhexnilium, also known as element 660, has seks­hundrað­og­seksti protons in its nucleus, and seks­hundrað­og­seksti electrons in its shells.