Septpentennium (Spe)

Septpentennium is the systematic name of the theoretical 759'инчи element in the periodic table with a symbol of Spe and atomic number of 759. Septpentennium, also known as element 759, has жети жүз элүү тогуз protons in its nucleus, and жети жүз элүү тогуз electrons in its shells.