Penthexunium (Phu)

Penthexunium is the systematic name of the theoretical ۵۶۱. element in the periodic table with a symbol of Phu and atomic number of 561. Penthexunium, also known as element 561, has پانصد و شصت و یک protons in its nucleus, and پانصد و شصت و یک electrons in its shells.