Question

Please explain Fajan's rule clearly with some examples

Answer 1

Fajan pointed out that greater the polarisation of anion more covalent character in it.
Ex:
Sodium chloride.

Answer 2

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Here is your answer

» For a given cation, covalent character Increases with increase in size of the anion

» For a given anion, covalent character increases with a decrease in the size of the cation

» Covalent character Increseas with increasing charge either on cation or an anion

» Covalent character is higher for compounds with cations with pseudo noble gas electronic configuration