Pentunoctium (Puo)

Pentunoctium is the systematic name of the theoretical 518. element in the periodic table with a symbol of Puo and atomic number of 518. Pentunoctium, also known as element 518, has πεντακόσια δεκα­οκτώ protons in its nucleus, and πεντακόσια δεκα­οκτώ electrons in its shells.