Octbiunium (Obu)

Octbiunium is the systematic name of the theoretical ۸۲۱. element in the periodic table with a symbol of Obu and atomic number of 821. Octbiunium, also known as element 821, has هشتصد و بیست و یک protons in its nucleus, and هشتصد و بیست و یک electrons in its shells.