Septquadennium (Sqe)
Septquadennium is the systematic name of the theoretical 749. element in the periodic table with a symbol of Sqe and atomic number of 749. Septquadennium, also known as element 749, has แจแแแแแกยญแแ แแแชแแยญแชแฎแ แ protons in its nucleus, and แจแแแแแกยญแแ แแแชแแยญแชแฎแ แ electrons in its shells.