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 - Topical Questions - Page 240c: 79b


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Generally, ionization energy increases as you go across the periodic table. However, Boron is an exception to the trend as it has an electron in an orbital that is alone. Since it takes a lot of energy to have a p orbital, the Boron does not hold on to this electron as tightly.
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