Hexennennium (Hee)

Hexennennium is the systematic name of the theoretical 699e element in the periodic table with a symbol of Hee and atomic number of 699. Hexennennium, also known as element 699, has zes­honderd­negen­en­negentig protons in its nucleus, and zes­honderd­negen­en­negentig electrons in its shells.