Hexhexpentium (Hhp)
Hexhexpentium is the systematic name of the theoretical thứ 665 element in the periodic table with a symbol of Hhp and atomic number of 665. Hexhexpentium, also known as element 665, has sáu trăm sáu mươi lăm protons in its nucleus, and sáu trăm sáu mươi lăm electrons in its shells.