Hexhexennium (Hhe)

Hexhexennium is the systematic name of the theoretical 669-и element in the periodic table with a symbol of Hhe and atomic number of 669. Hexhexennium, also known as element 669, has шестстотин шейсет и девет protons in its nucleus, and шестстотин шейсет и девет electrons in its shells.