Which of the following compounds has the leas | vedclass

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(A) The ionic character of alkaline earth metal halides depends on the polarizing power of the cation.As we move down the group from $Mg$ to $Ra$,the

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$MgCl_2$

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(A) The ionic character of alkaline earth metal halides depends on the polarizing power of the cation.As we move down the group from $Mg$ to $Ra$,the size of the cation increases and the ionization energy $(I.E.)$ decreases.According to Fajan's rule,smaller cations have higher polarizing power,which leads to more covalent character.Therefore,$Mg^{2+}$ has the smallest size and the highest polarizing power among the given options,making $MgCl_2$ the most covalent and least ionic.The order of ionic character is $MgCl_2 < CaCl_2 < SrCl_2 < BaCl_2 < RaCl_2$.

Which of the following compounds has the least ionic character?

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