Septennennium (See)

Septennennium is the systematic name of the theoretical ٧٩٩. element in the periodic table with a symbol of See and atomic number of 799. Septennennium, also known as element 799, has سبعة مائة وتسعة وتسعون protons in its nucleus, and سبعة مائة وتسعة وتسعون electrons in its shells.