Ennennseptium (Ees)

Ennennseptium is the systematic name of the theoretical thứ 997 element in the periodic table with a symbol of Ees and atomic number of 997. Ennennseptium, also known as element 997, has chín trăm chín mươi bảy protons in its nucleus, and chín trăm chín mươi bảy electrons in its shells.