Septbiennium (Sbe)

Septbiennium is the systematic name of the theoretical ۷۲۹. element in the periodic table with a symbol of Sbe and atomic number of 729. Septbiennium, also known as element 729, has هفتصد و بیست و نه protons in its nucleus, and هفتصد و بیست و نه electrons in its shells.