Septtrioctium (Sto)
Septtrioctium is the systematic name of the theoretical 738-и element in the periodic table with a symbol of Sto and atomic number of 738. Septtrioctium, also known as element 738, has седемстотин трийсет и осем protons in its nucleus, and седемстотин трийсет и осем electrons in its shells.