What noble gas can bond with a halogen?

The oxidising ability decreases down the group with fluorine being the strongest oxidising agent. In simple terms the formation of X- occurs in two steps.

Chemical Reactions of the Halogens

A strong oxidising agent will readily form X-. It will therefore, have a low bond energy and a high electron affinity. Both bond energies and electron affinities decrease down the group as the nuclear pull on the outer electrons decrease.

Explanation:

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