Hexhexoctium (Hho)
Hexhexoctium is the systematic name of the theoretical thứ 668 element in the periodic table with a symbol of Hho and atomic number of 668. Hexhexoctium, also known as element 668, has sáu trăm sáu mươi tám protons in its nucleus, and sáu trăm sáu mươi tám electrons in its shells.