Pentennoctium (Peo)
Pentennoctium is the systematic name of the theoretical ٥٩٨. element in the periodic table with a symbol of Peo and atomic number of 598. Pentennoctium, also known as element 598, has خمسة مائة وثمانية وتسعون protons in its nucleus, and خمسة مائة وثمانية وتسعون electrons in its shells.