Hextriennium (Hte)
Hextriennium is the systematic name of the theoretical 639. element in the periodic table with a symbol of Hte and atomic number of 639. Hextriennium, also known as element 639, has அறுநூறு முப்பது ஒன்பது protons in its nucleus, and அறுநூறு முப்பது ஒன்பது electrons in its shells.