Which among the following cations forms a lea | vedclass

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(A) The stability of a complex depends on the charge density and the electronic configuration of the central metal ion.$Cd^{2+}$ has a larger ionic ra

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$Cd^{2+}$

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(A) The stability of a complex depends on the charge density and the electronic configuration of the central metal ion.$Cd^{2+}$ has a larger ionic radius compared to the $3d$ transition metal ions ($Co^{2+}$,$Ni^{2+}$,$Fe^{2+}$).Due to its larger size and fully filled $d^{10}$ configuration,the electrostatic attraction between the metal ion and the ligand is weaker,resulting in a less stable complex.

Which among the following cations forms a least stable complex if the ligand is same?

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