Pentquadennium (Pqe)

Pentquadennium is the systematic name of the theoretical 549e element in the periodic table with a symbol of Pqe and atomic number of 549. Pentquadennium, also known as element 549, has vijf­honderd­negen­en­veertig protons in its nucleus, and vijf­honderd­negen­en­veertig electrons in its shells.