Problem: From the following ions (with their radii in pm), choose the pair that forms the strongest ionic bond and the pair that forms the weakest:Ion:           Mg2+     K+     Rb+     Ba2+     Cl−     O2−     I−Radius:     72      138    152      135     181     140    220

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From the following ions (with their radii in pm), choose the pair that forms the strongest ionic bond and the pair that forms the weakest:
Ion:           Mg2+     K+     Rb+     Ba2+     Cl     O2−     I
Radius:     72      138    152      135     181     140    220