Silicon Aufbau Diagram. They are rules we use to fill electron orbital filling diagrams. The lowest energy level of an atom is filled first.
Silicon is a chemical element with the symbol si and atomic number 14. This is shown by the aufbau princible shown here. It is a hard brittle crystalline solid with a blue grey metallic lustre and is a tetravalent metalloid and semiconductorit is a member of group 14 in the periodic table.
For each electron shell atom diagram the element symbol is listed in the nucleus.
And germanium tin lead and flerovium are below it. And germanium tin lead and flerovium are below it. The electron shells are shown moving outward from the nucleus. Since the s sublevel consists of just one orbital the second electron simply pairs up with the first electron as in helium.