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Answer to Question #53397 in Inorganic Chemistry for manisha

Question #53397
why only xenon form compound not any other noble gas?
Expert's answer
Xenon has a lot of electrons, hence the larger atomic mass, and the atomic radius is very large. Thus, the strength of the attraction between the outer electrons and the protons in the nucleus is weaker (increased distance from the nucleus means decreased attraction). With this decreased strength, they are more easily lost to other atoms.
As we go to higher numbers of the periodic table, generally the elements get more reactive. This is generally due to larger atoms filling larger orbitals with a charge density further away from the nucleus. Also the elements get less stable. Going with trends, Radon should be the most reactive.
Radon is very radioactive, has a half-life of 3-4 days approximately. It breaks down very quickly. It could be more reactive that Xenon, but no chemical element reacts with it.
For this reason only Xenon forms compounds because it can react (just barely).

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