Octoctennium (Ooe)
Octoctennium is the systematic name of the theoretical 889. element in the periodic table with a symbol of Ooe and atomic number of 889. Octoctennium, also known as element 889, has astoņsimt astoņdesmit deviņi protons in its nucleus, and astoņsimt astoņdesmit deviņi electrons in its shells.