Hexhexquadium (Hhq)
Hexhexquadium is the systematic name of the theoretical thứ 664 element in the periodic table with a symbol of Hhq and atomic number of 664. Hexhexquadium, also known as element 664, has sáu trăm sáu mươi tư protons in its nucleus, and sáu trăm sáu mươi tư electrons in its shells.