Octseptoctium (Oso)
Octseptoctium is the systematic name of the theoretical 878'инчи element in the periodic table with a symbol of Oso and atomic number of 878. Octseptoctium, also known as element 878, has сегиз жүз жетимиш сегиз protons in its nucleus, and сегиз жүз жетимиш сегиз electrons in its shells.