The overall of an atom is a nucleus (protons and neutrons), and 1 or 2 electrons. The rest are for large atoms: an electron shell, electrons, an electron shell, electrons, an electron shell, electrons, an electron shell, electrons, an electron shell, electrons, an electron shell, electrons, an electron shell, electrons.

Sulfur has 2 electrons in its first electron shell, 8 electrons in its second electron shell, and 6 electrons in its third electron shell.

No, lithium does not have a full outer shell. It has 1 electron in its outer shell, which allows it to easily lose that electron to achieve a stable electron configuration.

The 1S orbital will hold the innermost pair of electrons.