Hextriunium (Htu)
Hextriunium is the systematic name of the theoretical ٦٣١. element in the periodic table with a symbol of Htu and atomic number of 631. Hextriunium, also known as element 631, has ستة مائة وواحد وثلاثون protons in its nucleus, and ستة مائة وواحد وثلاثون electrons in its shells.