Octennunium (Oeu)
Octennunium is the systematic name of the theoretical ٨٩١. element in the periodic table with a symbol of Oeu and atomic number of 891. Octennunium, also known as element 891, has ثمانية مائة وواحد وتسعون protons in its nucleus, and ثمانية مائة وواحد وتسعون electrons in its shells.