Metal oxides are more vocal than metal fluoride justify
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- According to the formula for lattice energy, it is proportional to the product of the charges on the ions, and inversely proportional to the ionic separation
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According to the formula for lattice energy, it is proportional to the product of the charges on the ions, and inversely proportional to the ionic separation (we shall approximate it to be the sum of the ionic radii). In this case, the product of the charges is higher for PbO, and the sum of the ionic radii is similar between the two compounds. This results in the ionic bond in PbO being stronger than in PbF₂. Thus PbO is more thermodynamically stable.
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