Penthexquadium (Phq)
Penthexquadium is the systematic name of the theoretical 564ú element in the periodic table with a symbol of Phq and atomic number of 564. Penthexquadium, also known as element 564, has cúig chéad seasca a ceathair protons in its nucleus, and cúig chéad seasca a ceathair electrons in its shells.