Octennennium (Oee)

Octennennium is the systematic name of the theoretical 899. element in the periodic table with a symbol of Oee and atomic number of 899. Octennennium, also known as element 899, has aštuoni šimtai devyniasdešimt devyni protons in its nucleus, and aštuoni šimtai devyniasdešimt devyni electrons in its shells.