Pentpentoctium (Ppo)
Pentpentoctium is the systematic name of the theoretical 558. element in the periodic table with a symbol of Ppo and atomic number of 558. Pentpentoctium, also known as element 558, has pięćset pięćdziesiąt osiem protons in its nucleus, and pięćset pięćdziesiąt osiem electrons in its shells.