Enntriunium (Etu)
Enntriunium is the systematic name of the theoretical 931-и element in the periodic table with a symbol of Etu and atomic number of 931. Enntriunium, also known as element 931, has деветстотин трийсет и едно protons in its nucleus, and деветстотин трийсет и едно electrons in its shells.