Pentquadennium (Pqe)

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