Septpentennium (Spe)
Septpentennium is the systematic name of the theoretical ที่ 759 element in the periodic table with a symbol of Spe and atomic number of 759. Septpentennium, also known as element 759, has เจ็ดร้อยห้าสิบเก้า protons in its nucleus, and เจ็ดร้อยห้าสิบเก้า electrons in its shells.