Which of the following ions forms a complex w | vedclass

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(A) The coordination number of a metal ion in a complex depends on its size,charge,and the nature of the ligand. $Ag^{+}$ ion has a $d^{10}$ electroni

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$Ag^{+}$

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(A) The coordination number of a metal ion in a complex depends on its size,charge,and the nature of the ligand. $Ag^{+}$ ion has a $d^{10}$ electronic configuration and typically forms linear complexes with a coordination number of $2$ with strong field ligands like $CN^{-}$. The reaction is: $Ag^{+} + 2CN^{-} \rightarrow [Ag(CN)_2]^{-}$. Other ions like $Fe^{2+}$,$Ni^{2+}$,and $Cu^{2+}$ typically form complexes with coordination numbers of $4$ or $6$ (e.g.,$[Fe(CN)_6]^{4-}$,$[Ni(CN)_4]^{2-}$,$[Cu(CN)_4]^{2-}$).

Which of the following ions forms a complex with a coordination number of $2$ in the presence of excess $CN^{-}$?

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