Pentniloctium (Pno)
Pentniloctium is the systematic name of the theoretical thứ 508 element in the periodic table with a symbol of Pno and atomic number of 508. Pentniloctium, also known as element 508, has năm trăm lẻ tám protons in its nucleus, and năm trăm lẻ tám electrons in its shells.