Octennennium (Oee)

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