Septquadennium (Sqe)

Septquadennium is the systematic name of the theoretical ۷۴۹. element in the periodic table with a symbol of Sqe and atomic number of 749. Septquadennium, also known as element 749, has هفتصد و چهل و نه protons in its nucleus, and هفتصد و چهل و نه electrons in its shells.