Concept explainers
Interpretation:
The given ion pairs are to be arranged in increasing order of the quantity of energy released when they form from separated gas phase ions.
Concept introduction: Lattice energy is the energy required to break an ionic solid and transform its atoms into gaseous ions. Lattice energy can also be defined as the energy released when gaseous ions combine to form an ionic solid.
The square of distance is inversely proportional to the force of attraction. Therefore, lattice energy decreases down the group due to increase in atomic size. The product of charges of particles is directly proportional to the force of attraction. Therefore, lattice energy increases with an increase in charge on an atom.
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Principles of Chemistry: A Molecular Approach (3rd Edition)
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