Hexbiunium (Hbu)

Hexbiunium is the systematic name of the theoretical 621. element in the periodic table with a symbol of Hbu and atomic number of 621. Hexbiunium, also known as element 621, has kuusi­sataa­kaksi­kymmentä­yksi protons in its nucleus, and kuusi­sataa­kaksi­kymmentä­yksi electrons in its shells.