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AS CHARGE DOMINATES
IN ALCL3 LATTICE E. MUST B MORE SO IT MST B MOST IONIC BUT IT COVALENT
PLZ EXPLN THE ANSWR WITH REF 2 NACL MgO IN DTAIL
Dear raj,
FAJAN RULE SAYS THAT DISTORTION OF ELECTRON CLOUD TAKES PLACE WHEN SIZE OF THE CATION IS SMALLER THAN ANION . WHAT IF ITS REVERSE THAT IS SIZE OF ANION IS SMALLER THAN CATION FOR EXAMPLE CESIUM FLUORIDE. HOW DO WE EXPLAIN ITS IONIC NATURE THOUGH HERE ALSO THERE SHOULD BE DISTORTION.
According to fajan's rule condition for ionicity of a bond is
large cation small anion
reason: A cation is formed by loosing an electron as we go lower down the group size inc and I.E decreases and anion is formed by gaining an electron
E.A decreases as we go down a group so small size = high E.A
also small cation polarizes to greater extent as compared to large cation
We are all IITians and here to help you in your IIT JEE preparation. All the best. If you like this answer please approve it.... win exciting gifts by answering the questions on Discussion Forum Sagar Singh B.Tech IIT Delhi sagarsingh24.iitd@gmail.com
We are all IITians and here to help you in your IIT JEE preparation. All the best.
If you like this answer please approve it....
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Sagar Singh
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sagarsingh24.iitd@gmail.com
according to fazane rule the charge of Al is +3.......... Al is small size element..................... Cl is relatively bi size element........... so comparitively AlCl3 al will more attract cl than NaCl OR MgO ... so the shape gets disorder............... and more covalent character shows............
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