Answer
CaO
Work Step by Step
We know that CaO creates partial charges of 2+ and 2-, while KI creates partial charges of 1+ and 1-. Since the larger charge corresponds to a higher electrostatic attraction, CaO has a higher lattice energy than KI.
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 5 - Electron Configurations and the Periodic Table - Questions for Review and Thought - Applying Concepts - Page 240f: 129a
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