Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 9 - Sections 9.1-9.11 - Exercises - Problems by Topic: 43


This trend can be explained due to the increasing size of the metal cation.

Work Step by Step

The size of metal cations are in the order $Ba \gt Sr \gt Ca \gt Mg$. When the size of the metal cation increases, its distance from the oxygen anion also increases. This leads to a decrease in potential energy as the distance increases, and hence the lattice energy also decreases.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.