(a) Predict the cation-anion distance using the values of ionic radii given in Figure 7.7. (b) Calculate the difference between the experimentally measured ion-ion distances and the ones predicted from Figure 7.7. Assuming we have an accuracy of 0.04 Ãƒâ€¦ in the measurement, would you say that the two sets of ion-ion distances are the same or not? (c) What estimates of the cation-anion distance would you obtain for these four compounds using bonding atomic radii? Are these estimates as accurate as the estimates using ionic radii?