Septseptunium (Ssu)

Septseptunium is the systematic name of the theoretical 771e element in the periodic table with a symbol of Ssu and atomic number of 771. Septseptunium, also known as element 771, has zeven­honderd­een­en­zeventig protons in its nucleus, and zeven­honderd­een­en­zeventig electrons in its shells.