Septpentennium (Spe)

Septpentennium is the systematic name of the theoretical 759-шы element in the periodic table with a symbol of Spe and atomic number of 759. Septpentennium, also known as element 759, has жеті жүз елу тоғыз protons in its nucleus, and жеті жүз елу тоғыз electrons in its shells.