Hexennilium (Hen)

Hexennilium is the systematic name of the theoretical 690. element in the periodic table with a symbol of Hen and atomic number of 690. Hexennilium, also known as element 690, has kuusi­sataa­yhdeksän­kymmentä protons in its nucleus, and kuusi­sataa­yhdeksän­kymmentä electrons in its shells.