Hexhexennium (Hhe)

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