Septseptoctium (Sso)
Septseptoctium is the systematic name of the theoretical 778'inci element in the periodic table with a symbol of Sso and atomic number of 778. Septseptoctium, also known as element 778, has yeddi yüz yetmiş səkkiz protons in its nucleus, and yeddi yüz yetmiş səkkiz electrons in its shells.