Octennennium (Oee)
Octennennium is the systematic name of the theoretical 899वाँ element in the periodic table with a symbol of Oee and atomic number of 899. Octennennium, also known as element 899, has आठ सौ निन्यानबे protons in its nucleus, and आठ सौ निन्यानबे electrons in its shells.