Septoctunium (Sou)

Septoctunium is the systematic name of the theoretical 781e element in the periodic table with a symbol of Sou and atomic number of 781. Septoctunium, also known as element 781, has zeven­honderd­een­en­tachtig protons in its nucleus, and zeven­honderd­een­en­tachtig electrons in its shells.