Hexhexseptium (Hhs)
Hexhexseptium is the systematic name of the theoretical 667. element in the periodic table with a symbol of Hhs and atomic number of 667. Hexhexseptium, also known as element 667, has εξακόσια εξήντα επτά protons in its nucleus, and εξακόσια εξήντα επτά electrons in its shells.