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 šesť­sto šesťdesiat­jeden protons in its nucleus, and šesť­sto šesťdesiat­jeden electrons in its shells.