Pentennoctium (Peo)

Pentennoctium is the systematic name of the theoretical 598e element in the periodic table with a symbol of Peo and atomic number of 598. Pentennoctium, also known as element 598, has vijf­honderd­acht­en­negentig protons in its nucleus, and vijf­honderd­acht­en­negentig electrons in its shells.