Penthexunium (Phu)

Penthexunium is the systematic name of the theoretical 561. element in the periodic table with a symbol of Phu and atomic number of 561. Penthexunium, also known as element 561, has חמש מאות שישים ואחת protons in its nucleus, and חמש מאות שישים ואחת electrons in its shells.