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