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 aštuoni šimtai septyniasdešimt septyni protons in its nucleus, and aštuoni šimtai septyniasdešimt septyni electrons in its shells.