Hextrioctium (Hto)
Hextrioctium is the systematic name of the theoretical 638. element in the periodic table with a symbol of Hto and atomic number of 638. Hextrioctium, also known as element 638, has šeši šimtai trisdešimt aštuoni protons in its nucleus, and šeši šimtai trisdešimt aštuoni electrons in its shells.