Question

Why is the melting point of sodium fluoride higher than that of sodium iodide

Answer 1

Answer:

Fluoride ions are smaller than chloride ions, which in turn are smaller than bromide and iodide ions. This means the ions can be packed closer together, and the (center to center) distance between the positive and negative ions is smaller. Electrostatic force is varies with the inverse square of distance, so the ions are more strongly attracted to each other in NaF than in NaCl, NaBr or NaI. Stronger attractions between the ions in the crystal lattice means a higher temperature is required to melt the crystal.

Explanation:

Answer 2

Answer:

Explanation:

naf because fluorine has less polarising power compared to iodine