The stability of complex ion depend upon charge, size electronegativity of metal ion. Greater the charge of metal ion greater would be the stability. As size of metal ion decreases stability of metal ion increases complex ion more stable if chelating ligand present.
Which is most correct order of stability

Options

A. `Zn^(+2)gtCu^(+2)gtNi^(+2)gtCo^(+2)gtFe^(+2)gtMn^(+2)`
B. `Zn^(+2)ltCu^(+2)ltNi^(+2)ltCo^(+2)ltFe^(+2)ltMn^(+2)`
C. `Zn^(+2)=Cu^(+2)gtNi^(+2)gtCo^(+2)gtFe^(+2)gtMn^(+2)`
D. `Zn^(+2)gtCu^(+2)gtNi^(+2)=Co^(+2)gtFe^(+2)gtMn^(+2)`

Answer

A

Explanation

Stability of complex `alpha` charge density, small cations with high charge density will form stable complexes.