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 вісімсот девʼяносто девʼять protons in its nucleus, and вісімсот девʼяносто девʼять electrons in its shells.