First lets know about Fajan's rule:-
the factor on which the magnitude of polarising power of a cation to polarise a near by anion and the polarisibility of an anion depends. these factors have been sujested by fajans and hence are called Fajans rule.
1. Charge on cation or anion: higher is the positive charge on the cation, greater is its polarising power to polarise a given nearby anion.
2. Size of the cation: smaller the size of cation, higher is its polarising power to polarise a given nearby anion.
3. Size of anion: larger the size of anion, more strongly or easily it will polarised by a given cation. i.e. more will be its polarisibility.
4. Electronic configuration of cation: a cation with 18 electron valence shell configuration (ns2p6d10 configuration) has greater polarising power then that with 8 electron valence shell configuration (ns2p6 configuration).
more info need to add
the factor on which the magnitude of polarising power of a cation to polarise a near by anion and the polarisibility of an anion depends. these factors have been sujested by fajans and hence are called Fajans rule.
1. Charge on cation or anion: higher is the positive charge on the cation, greater is its polarising power to polarise a given nearby anion.
2. Size of the cation: smaller the size of cation, higher is its polarising power to polarise a given nearby anion.
3. Size of anion: larger the size of anion, more strongly or easily it will polarised by a given cation. i.e. more will be its polarisibility.
4. Electronic configuration of cation: a cation with 18 electron valence shell configuration (ns2p6d10 configuration) has greater polarising power then that with 8 electron valence shell configuration (ns2p6 configuration).
more info need to add
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