Octennunium (Oeu)

Octennunium is the systematic name of the theoretical 891e element in the periodic table with a symbol of Oeu and atomic number of 891. Octennunium, also known as element 891, has acht­honderd­een­en­negentig protons in its nucleus, and acht­honderd­een­en­negentig electrons in its shells.