Septennunium (Seu)

Septennunium is the systematic name of the theoretical thứ 791 element in the periodic table with a symbol of Seu and atomic number of 791. Septennunium, also known as element 791, has bảy trăm chín mươi mốt protons in its nucleus, and bảy trăm chín mươi mốt electrons in its shells.