Hexennunium (Heu)

Hexennunium is the systematic name of the theoretical ที่ 691 element in the periodic table with a symbol of Heu and atomic number of 691. Hexennunium, also known as element 691, has หก​ร้อย​เก้า​สิบ​เอ็ด protons in its nucleus, and หก​ร้อย​เก้า​สิบ​เอ็ด electrons in its shells.