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 sjey­hundrað­og­fýrati­níggju protons in its nucleus, and sjey­hundrað­og­fýrati­níggju electrons in its shells.