Octoctennium (Ooe)
Octoctennium is the systematic name of the theoretical ۸۸۹. element in the periodic table with a symbol of Ooe and atomic number of 889. Octoctennium, also known as element 889, has هشتصد و هشتاد و نه protons in its nucleus, and هشتصد و هشتاد و نه electrons in its shells.