Pentquadennium (Pqe)

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