Answer & explanation:
The octet rule states that atoms must have eight electrons in their valence shell (the last electron distribution layer of an atom, or the outer energy level).
For atoms to have the full valence shell, chemical bonds must be made to donate, receive, or share electrons. Normally, atoms tend to share electrons until they acquire stability (complete valence shell).
Noble gases are the elements of the periodic table that have eight electrons in the valence shell, with Helium (He) the only exception, which has two electrons.
When an element reaches its stability, it means that it will not bind to other atoms, because it no longer has a tendency to gain or lose electrons, that is why we find no compounds formed by noble gases.
