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The p-Block Elements

Question

Assign reason for each of the following:
Noble gases are mostly chemically inert.

Answer

Genral electronic configuration of noble gas is ns² np⁶. Thus having stable coniguration.
Noble gases are mostly chemically inert due to the following reasons:
(i) Atoms of the noble gases have stable closed shell electronic configuration.
(ii) Noble gases have exceptionally high ionisation energies.
(iii) Noble gases have very low electron affinities.