Problem: Which of the following trends in lattice energy is due to differences in ionic radii?(a) NaCl > RbBr > CsBr(b) BaO > KF(c) SrO > SrCl2

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lattice energy=cation charge×anion chargecation period # + anion period #


Recall that the trend for atomic radius is as follows: it increases from right to left and down a group in the periodic table.


higher atomic radius  lower lattice energy 


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Problem Details

Which of the following trends in lattice energy is due to differences in ionic radii?
(a) NaCl > RbBr > CsBr
(b) BaO > KF
(c) SrO > SrCl2