Why dont noble gases chemically bond with another element or each other?

Answer 1

Noble gases have completely filled orbitals / energy levels. They generally have 8 valence electrons (helium has only 2) and have stable electronic configuration. Hence they are chemically inert and generally donot form compounds under normal conditions.

Answer 2

Noble gases have full valence electron shells, making them very stable and unreactive. This stability reduces their tendency to either gain or lose electrons to form bonds with other elements. Additionally, they have very low electronegativity, which means they have little inclination to attract other atoms for bonding.