We’re being asked to determine which distance would be longer, Na-Cl or K-F.
To estimate the lattice energy (or ionic bond energy) of an ionic compound, we will use the following equation:
Radius = period number
The lattice energies of NaCl and KF are given in the table in the introduction. Based on the lattice energies, would you expect the Na-Cl or the K-F distance to be longer?
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