Septbiennium (Sbe)

Septbiennium is the systematic name of the theoretical ٧٢٩. element in the periodic table with a symbol of Sbe and atomic number of 729. Septbiennium, also known as element 729, has سبعة مائة وتسعة وعشرون protons in its nucleus, and سبعة مائة وتسعة وعشرون electrons in its shells.