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 seks­hundrað­og­tríati­átta protons in its nucleus, and seks­hundrað­og­tríati­átta electrons in its shells.