Chemistry: A Molecular Approach (3rd Edition)

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

Chapter 8 - Sections 8.1-8.9 - Exercises - Review Questions: 34

Answer

Ionization energy generally decreases as you move down a column in the periodic table because electrons in the outermost principal energy level are increasingly farther away from the positively charged nucleus and are therefore held less tightly.

Work Step by Step

Ionization energy generally increases as you move to the right across a period in the periodic table because electrons in the outermost principal energy level generally experience a greater effective nuclear charge.
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