Septquadennium (Sqe)

Septquadennium is the systematic name of the theoretical thứ 749 element in the periodic table with a symbol of Sqe and atomic number of 749. Septquadennium, also known as element 749, has bảy trăm bốn mươi chín protons in its nucleus, and bảy trăm bốn mươi chín electrons in its shells.