Septquadennium (Sqe)

Septquadennium is the systematic name of the theoretical 749a element in the periodic table with a symbol of Sqe and atomic number of 749. Septquadennium, also known as element 749, has şapte sute patruzeci şi nouă protons in its nucleus, and şapte sute patruzeci şi nouă electrons in its shells.