Septquadennium (Sqe)

Septquadennium is the systematic name of the theoretical 749-шы element in the periodic table with a symbol of Sqe and atomic number of 749. Septquadennium, also known as element 749, has жеті жүз қырық тоғыз protons in its nucleus, and жеті жүз қырық тоғыз electrons in its shells.