Penthexhexium (Phh)

Penthexhexium is the systematic name of the theoretical 566e element in the periodic table with a symbol of Phh and atomic number of 566. Penthexhexium, also known as element 566, has vijf­honderd­zes­en­zestig protons in its nucleus, and vijf­honderd­zes­en­zestig electrons in its shells.