Octpentunium (Opu)

Octpentunium is the systematic name of the theoretical 851. element in the periodic table with a symbol of Opu and atomic number of 851. Octpentunium, also known as element 851, has ութ­հարյուր հիսուն­մեկ protons in its nucleus, and ութ­հարյուր հիսուն­մեկ electrons in its shells.