Octoctnilium (Oon)
Octoctnilium is the systematic name of the theoretical 880. element in the periodic table with a symbol of Oon and atomic number of 880. Octoctnilium, also known as element 880, has οκτακόσια ογδόντα protons in its nucleus, and οκτακόσια ογδόντα electrons in its shells.