Septbiennium (Sbe)

Septbiennium is the systematic name of the theoretical ที่ 729 element in the periodic table with a symbol of Sbe and atomic number of 729. Septbiennium, also known as element 729, has เจ็ด​ร้อย​ยี่​สิบ​เก้า protons in its nucleus, and เจ็ด​ร้อย​ยี่​สิบ​เก้า electrons in its shells.