Septbiennium (Sbe)

Septbiennium is the systematic name of the theoretical 729'inci element in the periodic table with a symbol of Sbe and atomic number of 729. Septbiennium, also known as element 729, has yeddi yüz iyirmi doqquz protons in its nucleus, and yeddi yüz iyirmi doqquz electrons in its shells.