Septtriunium (Stu)

Septtriunium is the systematic name of the theoretical 731. element in the periodic table with a symbol of Stu and atomic number of 731. Septtriunium, also known as element 731, has siwen­honnert­eenandrësseg protons in its nucleus, and siwen­honnert­eenandrësseg electrons in its shells.