Hexhexennium (Hhe)

Hexhexennium is the systematic name of the theoretical ที่ 669 element in the periodic table with a symbol of Hhe and atomic number of 669. Hexhexennium, also known as element 669, has หก​ร้อย​หก​สิบ​เก้า protons in its nucleus, and หก​ร้อย​หก​สิบ​เก้า electrons in its shells.