Chemistry and Chemical Reactivity (9th Edition)

by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.

Published by Cengage Learning

ISBN 10: 1133949649

ISBN 13: 978-1-13394-964-0

Chapter 7 The Structure of Atoms and Periodic Trends - Study Questions - Page 281: 3

Answer

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Work Step by Step

In order to create the noble gas configuration, look for the noble gas that comes before the given element. Then, starting at that element, write the correct electron configuration. Cr: $[Ar]\ 3d^5\ 4s^1$ Fe: $[Ar]\ 3d^6\ 4s^2$

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