Question

State Fajan's rules and give suitable examples.

Answer 1

$\huge\red{As-Salamu-Alykum}$


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$\huge\purple{Fajan's rule }$


Fajan rules states that those ions which have small size but more positive charge will form covalent bond .

while those which have large size and less positive charge will form ionic bond .

Example

BeCl2 will form covalent bond and LiCl will form ionic bond


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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