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 syv­hundrede og tre­og­halvfjerds protons in its nucleus, and syv­hundrede og tre­og­halvfjerds electrons in its shells.