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 sechs­hundert­ein­und­sechzig protons in its nucleus, and sechs­hundert­ein­und­sechzig electrons in its shells.