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