Hexquadtrium (Hqt)
Hexquadtrium is the systematic name of the theoretical 643. element in the periodic table with a symbol of Hqt and atomic number of 643. Hexquadtrium, also known as element 643, has அறுநூறு நாற்பது மூன்று protons in its nucleus, and அறுநூறு நாற்பது மூன்று electrons in its shells.