Pentennennium (Pee)

Pentennennium is the systematic name of the theoretical 599e element in the periodic table with a symbol of Pee and atomic number of 599. Pentennennium, also known as element 599, has vijf­honderd­negen­en­negentig protons in its nucleus, and vijf­honderd­negen­en­negentig electrons in its shells.