Pentennseptium (Pes)
Pentennseptium is the systematic name of the theoretical ۵۹۷. element in the periodic table with a symbol of Pes and atomic number of 597. Pentennseptium, also known as element 597, has پانصد و نود و هفت protons in its nucleus, and پانصد و نود و هفت electrons in its shells.