Pentoctunium (Pou)
Pentoctunium is the systematic name of the theoretical 581. element in the periodic table with a symbol of Pou and atomic number of 581. Pentoctunium, also known as element 581, has ħames mija u wieħed u tmenin protons in its nucleus, and ħames mija u wieħed u tmenin electrons in its shells.