Chemistry: The Molecular Science (5th Edition)

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 - More Challenging Questions - Page 240g: 138


electron configuration

Work Step by Step

We know that all of Beryllium's shell is completely filled, while Boron has a shell that is not full. Since completely filled shells are more stable than partially filled shells, Beryllium is more stable. Furthermore, Beryllium has a higher first ionization energy than Boron, even though it is larger.
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