Pentnilunium (Pnu)

Pentnilunium is the systematic name of the theoretical 501. element in the periodic table with a symbol of Pnu and atomic number of 501. Pentnilunium, also known as element 501, has հինգ­հարյուր մեկ protons in its nucleus, and հինգ­հարյուր մեկ electrons in its shells.