Hexpentennium (Hpe)

Hexpentennium is the systematic name of the theoretical ۶۵۹. element in the periodic table with a symbol of Hpe and atomic number of 659. Hexpentennium, also known as element 659, has ششصد و پنجاه و نه protons in its nucleus, and ششصد و پنجاه و نه electrons in its shells.