Octpentunium (Opu)
Octpentunium is the systematic name of the theoretical ٨٥١. element in the periodic table with a symbol of Opu and atomic number of 851. Octpentunium, also known as element 851, has ثمانية مائة وواحد وخمسون protons in its nucleus, and ثمانية مائة وواحد وخمسون electrons in its shells.