Hexennoctium (Heo)
Hexennoctium is the systematic name of the theoretical thứ 698 element in the periodic table with a symbol of Heo and atomic number of 698. Hexennoctium, also known as element 698, has sáu trăm chín mươi tám protons in its nucleus, and sáu trăm chín mươi tám electrons in its shells.