Hexquadtrium (Hqt)
Hexquadtrium is the systematic name of the theoretical 643ste element in the periodic table with a symbol of Hqt and atomic number of 643. Hexquadtrium, also known as element 643, has seshonderd drie-en-veertig protons in its nucleus, and seshonderd drie-en-veertig electrons in its shells.