Octseptseptium (Oss)
Octseptseptium is the systematic name of the theoretical 877. element in the periodic table with a symbol of Oss and atomic number of 877. Octseptseptium, also known as element 877, has осумсто седумдесет и седум protons in its nucleus, and осумсто седумдесет и седум electrons in its shells.