Hextrioctium (Hto)

Hextrioctium is the systematic name of the theoretical thứ 638 element in the periodic table with a symbol of Hto and atomic number of 638. Hextrioctium, also known as element 638, has sáu trăm ba mươi tám protons in its nucleus, and sáu trăm ba mươi tám electrons in its shells.