Octoctseptium (Oos)
Octoctseptium is the systematic name of the theoretical 887. element in the periodic table with a symbol of Oos and atomic number of 887. Octoctseptium, also known as element 887, has вісімсот вісімдесят сім protons in its nucleus, and вісімсот вісімдесят сім electrons in its shells.