Interpretation: The given sentence is to be completed.
Concept Introduction : Lattice energy is the amount of energy released when 1 mole of a solid ionic compound is converted to gaseous ionic constituents. It is different for different ionic compounds.
Answer to Problem 12STP
As the atomic radius of either the halogen or the alkali metal increases, the lattice energy decreases.
Explanation of Solution
In the given graph, the lattice energy for Li with F is greater than the lattice energy for Na with F, atomic size of Na is greater than Li. But the lattice energy decreases as the size of the metal increases.
Hence, the atomic radius of alkali metals increases, and the lattice energy for alkali metals decreases.
Similarly, the lattice energy for Li with F is greater than the lattice energy for Li with Cl, atomic size of F is smaller than Cl. But the lattice energy decreases as the size of the halogen increases.
Hence, as the atomic radius of halogen increases, the lattice energy for alkali metals decreases.
As the atomic radius of either the halogen or the alkali metal increases, the lattice energy decreases.
Chapter 7 Solutions
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