Octbiunium (Obu)

Octbiunium is the systematic name of the theoretical 821e element in the periodic table with a symbol of Obu and atomic number of 821. Octbiunium, also known as element 821, has acht­honderd­een­en­twintig protons in its nucleus, and acht­honderd­een­en­twintig electrons in its shells.