Ennennilium (Een)

Ennennilium is the systematic name of the theoretical 990. element in the periodic table with a symbol of Een and atomic number of 990. Ennennilium, also known as element 990, has yhdeksän­sataa­yhdeksän­kymmentä protons in its nucleus, and yhdeksän­sataa­yhdeksän­kymmentä electrons in its shells.