Hexpentoctium (Hpo)

Hexpentoctium is the systematic name of the theoretical 658e element in the periodic table with a symbol of Hpo and atomic number of 658. Hexpentoctium, also known as element 658, has zes­honderd­acht­en­vijftig protons in its nucleus, and zes­honderd­acht­en­vijftig electrons in its shells.