Which of the following cations forms the leas | vedclass

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(B) The stability of complexes formed by transition metal ions with the same ligand generally follows the Irving-Williams series. The order of stabili

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$Fe^{2+}$

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(B) The stability of complexes formed by transition metal ions with the same ligand generally follows the Irving-Williams series. The order of stability for divalent metal ions is: $Mn^{2+}  Zn^{2+}$. Among the given options ($Co^{2+}$,$Fe^{2+}$,$Cd^{2+}$,$Cu^{2+}$),$Fe^{2+}$ has the lowest stability constant because it appears earliest in the series among the transition metals listed. $Cd^{2+}$ is a $d^{10}$ ion and generally forms less stable complexes compared to the $3d$ transition series ions due to its larger size and lower charge density.

Which of the following cations forms the least stable complex with the same ligand?

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