Septpentoctium (Spo)
Septpentoctium is the systematic name of the theoretical 758-и element in the periodic table with a symbol of Spo and atomic number of 758. Septpentoctium, also known as element 758, has седемстотин петдесет и осем protons in its nucleus, and седемстотин петдесет и осем electrons in its shells.