Penthexquadium (Phq)
Penthexquadium is the systematic name of the theoretical thứ 564 element in the periodic table with a symbol of Phq and atomic number of 564. Penthexquadium, also known as element 564, has năm trăm sáu mươi tư protons in its nucleus, and năm trăm sáu mươi tư electrons in its shells.