Hexhexnilium (Hhn)

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