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: 6

Answer

The periodic law was based on the observation that certain properties recur periodically when elements are arranged in the order of increasing atomic mass.

Work Step by Step

Quantum mechanical theory was the theory that explained the underlying reasons for the periodic law. It explained why the properties of the elements recurred and why certain elements had similar properties.
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