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 šeši šimtai dvidešimt vienas protons in its nucleus, and šeši šimtai dvidešimt vienas electrons in its shells.