Octseptseptium (Oss)
Octseptseptium is the systematic name of the theoretical 877a element in the periodic table with a symbol of Oss and atomic number of 877. Octseptseptium, also known as element 877, has opt sute şaptezeci şi şapte protons in its nucleus, and opt sute şaptezeci şi şapte electrons in its shells.