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in p-Block Elements – II by (34.6k points)
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Give two examples to show the anomalous behaviour of fluorine.

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The anomalous behaviour of fluorine is due to its: 

1. Small size 

2. highest electronegativity 

3. low F-F bond dissociation enethalpy 

4. non-availability of d-orbitals in its valence shell. 

The two examples are: 

1. Due to non-availability of d-orbitals in its valence shell, fluorine cannot expand its octet, therefore, shows only -1 oxidation state while all other halogens due to the presence of d-orbitals shows positive 

 2. Due to its small size, the three lone pair of electrons on each F atom in F – F molecule, repel the bond pair. As a result, F – F bond dissociation energy is lower than that of Cl – Cl bond.

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