Septennennium (See)

Septennennium is the systematic name of the theoretical ที่ 799 element in the periodic table with a symbol of See and atomic number of 799. Septennennium, also known as element 799, has เจ็ด​ร้อย​เก้า​สิบ​เก้า protons in its nucleus, and เจ็ด​ร้อย​เก้า​สิบ​เก้า electrons in its shells.