Problem: In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation-anion distances are 2.01 Å (Li - F), 2.82 Å (Na - Cl), 3.30 Å (K - Br), and 3.67 Å (Rb - I), respectively. Calculate the difference between the experimentally measured ion–ion distances and the ones predicted from the figure.

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We are asked to  calculate the difference between the experimentally measured ion–ion distances and the ones predicted from the figure given:

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Problem Details
In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation-anion distances are 2.01 Å (Li - F), 2.82 Å (Na - Cl), 3.30 Å (K - Br), and 3.67 Å (Rb - I), respectively. Calculate the difference between the experimentally measured ion–ion distances and the ones predicted from the figure.

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