Chemistry: Molecular Approach (4th Edition)

Published by Pearson
ISBN 10: 0134112830
ISBN 13: 978-0-13411-283-1

Chapter 9 - Exercises: 43

Answer

The lattice energy decreases with increasing size of the alkaline earth metal ion.

Work Step by Step

When the size of the alkaline earth metal ion increases, so does the distance between this cation and the oxygen ion. This increase in distance decreases the potential energy of the oxide, so the magnitude of lattice energy decreases.
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