Pentennseptium (Pes)
Pentennseptium is the systematic name of the theoretical 597. element in the periodic table with a symbol of Pes and atomic number of 597. Pentennseptium, also known as element 597, has piecsimt deviņdesmit septiņi protons in its nucleus, and piecsimt deviņdesmit septiņi electrons in its shells.