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 fënnef­honnert­uechtzéng protons in its nucleus, and fënnef­honnert­uechtzéng electrons in its shells.