Octbiunium (Obu)

Octbiunium is the systematic name of the theoretical 821. element in the periodic table with a symbol of Obu and atomic number of 821. Octbiunium, also known as element 821, has aštuoni šimtai dvidešimt vienas protons in its nucleus, and aštuoni šimtai dvidešimt vienas electrons in its shells.