Hexhexseptium (Hhs)
Hexhexseptium is the systematic name of the theoretical thứ 667 element in the periodic table with a symbol of Hhs and atomic number of 667. Hexhexseptium, also known as element 667, has sáu trăm sáu mươi bảy protons in its nucleus, and sáu trăm sáu mươi bảy electrons in its shells.