Septsepttrium (Sst)

Septsepttrium is the systematic name of the theoretical 773-ші element in the periodic table with a symbol of Sst and atomic number of 773. Septsepttrium, also known as element 773, has жеті жүз жетпіс үш protons in its nucleus, and жеті жүз жетпіс үш electrons in its shells.