Hexpentennium (Hpe)

Hexpentennium is the systematic name of the theoretical 659. element in the periodic table with a symbol of Hpe and atomic number of 659. Hexpentennium, also known as element 659, has шестьсот пятьдесят девять protons in its nucleus, and шестьсот пятьдесят девять electrons in its shells.