Septsepttrium (Sst)

Septsepttrium is the systematic name of the theoretical ۷۷۳. element in the periodic table with a symbol of Sst and atomic number of 773. Septsepttrium, also known as element 773, has هفتصد و هفتاد و سه protons in its nucleus, and هفتصد و هفتاد و سه electrons in its shells.