Octennoctium (Oeo)
Octennoctium is the systematic name of the theoretical ที่ 898 element in the periodic table with a symbol of Oeo and atomic number of 898. Octennoctium, also known as element 898, has แปดร้อยเก้าสิบแปด protons in its nucleus, and แปดร้อยเก้าสิบแปด electrons in its shells.