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 viissada nelikümmend üheksa protons in its nucleus, and viissada nelikümmend üheksa electrons in its shells.