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