Septseptseptium (Sss)

Septseptseptium is the systematic name of the theoretical 777e element in the periodic table with a symbol of Sss and atomic number of 777. Septseptseptium, also known as element 777, has zeven­honderd­zeven­en­zeventig protons in its nucleus, and zeven­honderd­zeven­en­zeventig electrons in its shells.