Septsepttrium (Sst)

Septsepttrium is the systematic name of the theoretical 773e element in the periodic table with a symbol of Sst and atomic number of 773. Septsepttrium, also known as element 773, has zeven­honderd­drie­ën­zeventig protons in its nucleus, and zeven­honderd­drie­ën­zeventig electrons in its shells.