Septbiennium (Sbe)

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