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: 10


Penetration is the phenomenon of a higher level atomic orbital having a significant amount of probability within the space occupied by an orbital of a lower energy level.

Work Step by Step

For example, the 2s orbital penetrates into the 1s orbital. As an outer electron undergoes penetration into the region occupied by the inner electron, it experiences a greater nucleic charge and therefore a lower energy according to Coulomb's Law.
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