Octennunium (Oeu)

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