Septennennium (See)

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