Hexpentennium (Hpe)

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