Octbiunium (Obu)

Octbiunium is the systematic name of the theoretical ที่ 821 element in the periodic table with a symbol of Obu and atomic number of 821. Octbiunium, also known as element 821, has แปด​ร้อย​ยี่​สิบ​เอ็ด protons in its nucleus, and แปด​ร้อย​ยี่​สิบ​เอ็ด electrons in its shells.