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 siwen­honnert­nénganfofzeg protons in its nucleus, and siwen­honnert­nénganfofzeg electrons in its shells.