Hexhexennium (Hhe)

Hexhexennium is the systematic name of the theoretical 669वाँ element in the periodic table with a symbol of Hhe and atomic number of 669. Hexhexennium, also known as element 669, has छह सौ उनहत्तर protons in its nucleus, and छह सौ उनहत्तर electrons in its shells.