Hextrioctium (Hto)

Hextrioctium is the systematic name of the theoretical ۶۳۸. element in the periodic table with a symbol of Hto and atomic number of 638. Hextrioctium, also known as element 638, has ششصد و سی و هشت protons in its nucleus, and ششصد و سی و هشت electrons in its shells.