Pentquadennium (Pqe)

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