Hexhexnilium (Hhn)

Hexhexnilium is the systematic name of the theoretical 660. element in the periodic table with a symbol of Hhn and atomic number of 660. Hexhexnilium, also known as element 660, has šesť­sto šesťdesiat protons in its nucleus, and šesť­sto šesťdesiat electrons in its shells.