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 fünf­hundert­ein­und­sechzig protons in its nucleus, and fünf­hundert­ein­und­sechzig electrons in its shells.