Hexhexpentium (Hhp)

Hexhexpentium is the systematic name of the theoretical 665e element in the periodic table with a symbol of Hhp and atomic number of 665. Hexhexpentium, also known as element 665, has zes­honderd­vijf­en­zestig protons in its nucleus, and zes­honderd­vijf­en­zestig electrons in its shells.