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