Pentnilennium (Pne)

Pentnilennium is the systematic name of the theoretical ที่ 509 element in the periodic table with a symbol of Pne and atomic number of 509. Pentnilennium, also known as element 509, has ห้า​ร้อย​เก้า protons in its nucleus, and ห้า​ร้อย​เก้า electrons in its shells.