Pentquadquadium (Pqq)
Pentquadquadium is the systematic name of the theoretical 544ú element in the periodic table with a symbol of Pqq and atomic number of 544. Pentquadquadium, also known as element 544, has cúig chéad daichead a ceathair protons in its nucleus, and cúig chéad daichead a ceathair electrons in its shells.