Octseptoctium (Oso)

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