Pentnilbium (Pnb)

Pentnilbium is the systematic name of the theoretical thứ 502 element in the periodic table with a symbol of Pnb and atomic number of 502. Pentnilbium, also known as element 502, has năm trăm lẻ hai protons in its nucleus, and năm trăm lẻ hai electrons in its shells.