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