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 septyni šimtai trisdešimt vienas protons in its nucleus, and septyni šimtai trisdešimt vienas electrons in its shells.