Septennilium (Sen)

Septennilium is the systematic name of the theoretical ที่ 790 element in the periodic table with a symbol of Sen and atomic number of 790. Septennilium, also known as element 790, has เจ็ด​ร้อย​เก้า​สิบ protons in its nucleus, and เจ็ด​ร้อย​เก้า​สิบ electrons in its shells.