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