Penthexhexium (Phh)
Penthexhexium is the systematic name of the theoretical 566वाँ element in the periodic table with a symbol of Phh and atomic number of 566. Penthexhexium, also known as element 566, has पाँच सौ छियासठ protons in its nucleus, and पाँच सौ छियासठ electrons in its shells.