Hexhexennium (Hhe)

Hexhexennium is the systematic name of the theoretical ۶۶۹. element in the periodic table with a symbol of Hhe and atomic number of 669. Hexhexennium, also known as element 669, has ششصد و شصت و نه protons in its nucleus, and ششصد و شصت و نه electrons in its shells.