Pentennunium (Peu)

Pentennunium is the systematic name of the theoretical 591. element in the periodic table with a symbol of Peu and atomic number of 591. Pentennunium, also known as element 591, has penki šimtai devyniasdešimt vienas protons in its nucleus, and penki šimtai devyniasdešimt vienas electrons in its shells.