Septpentennium (Spe)

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