Octennilium (Oen)

Octennilium is the systematic name of the theoretical 890. element in the periodic table with a symbol of Oen and atomic number of 890. Octennilium, also known as element 890, has kahdeksan­sataa­yhdeksän­kymmentä protons in its nucleus, and kahdeksan­sataa­yhdeksän­kymmentä electrons in its shells.