Septquadennium (Sqe)

Septquadennium is the systematic name of the theoretical ที่ 749 element in the periodic table with a symbol of Sqe and atomic number of 749. Septquadennium, also known as element 749, has เจ็ด​ร้อย​สี่​สิบ​เก้า protons in its nucleus, and เจ็ด​ร้อย​สี่​สิบ​เก้า electrons in its shells.