Octseptunium (Osu)
Octseptunium is the systematic name of the theoretical 871. element in the periodic table with a symbol of Osu and atomic number of 871. Octseptunium, also known as element 871, has kahdeksansataaseitsemänkymmentäyksi protons in its nucleus, and kahdeksansataaseitsemänkymmentäyksi electrons in its shells.