Pentennoctium (Peo)
Pentennoctium is the systematic name of the theoretical ที่ 598 element in the periodic table with a symbol of Peo and atomic number of 598. Pentennoctium, also known as element 598, has ห้าร้อยเก้าสิบแปด protons in its nucleus, and ห้าร้อยเก้าสิบแปด electrons in its shells.