Octseptoctium (Oso)

Octseptoctium is the systematic name of the theoretical 878. element in the periodic table with a symbol of Oso and atomic number of 878. Octseptoctium, also known as element 878, has otte­hundrede og otte­og­halvfjerds protons in its nucleus, and otte­hundrede og otte­og­halvfjerds electrons in its shells.