Octpentunium (Opu)
Octpentunium is the systematic name of the theoretical 851'инчи element in the periodic table with a symbol of Opu and atomic number of 851. Octpentunium, also known as element 851, has сегиз жүз элүү бир protons in its nucleus, and сегиз жүз элүү бир electrons in its shells.