Hexhexunium (Hhu)

Hexhexunium is the systematic name of the theoretical 661. element in the periodic table with a symbol of Hhu and atomic number of 661. Hexhexunium, also known as element 661, has kuusi­sataa­kuusi­kymmentä­yksi protons in its nucleus, and kuusi­sataa­kuusi­kymmentä­yksi electrons in its shells.