Hexennennium (Hee)

Hexennennium is the systematic name of the theoretical thứ 699 element in the periodic table with a symbol of Hee and atomic number of 699. Hexennennium, also known as element 699, has sáu trăm chín mươi chín protons in its nucleus, and sáu trăm chín mươi chín electrons in its shells.