Hexennennium (Hee)

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