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: 25a

Answer

The alkali metals have one valance electron and are among the most reactive metals because their electron configuration $(ns^{1})$ is one electron beyond a nobles gas configuration.

Work Step by Step

They readily react to lose $(ns^{1})$ electron obtaining a noble gas configuration. This explains why alkali metals tend to form +1 cations.
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