Ennennennium (Eee)

Ennennennium is the systematic name of the theoretical 999. element in the periodic table with a symbol of Eee and atomic number of 999. Ennennennium, also known as element 999, has devyni šimtai devyniasdešimt devyni protons in its nucleus, and devyni šimtai devyniasdešimt devyni electrons in its shells.