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Why an ionic bond is formed between two ...

Why an ionic bond is formed between two elements having large difference in their electrongativity ?

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The more electronegative element will attract the shared pair of electrons to such a large extent extent than the
other that it will amount to transfer of electron resulting in the formation of ions .
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  19. Draw the shapes of the following hybrid orbitals : sp, sp^(2), sp^(3...

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