Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 7 The Structure of Atoms and Periodic Trends - 7-6 Periodic Trends and Chemical Properties - Applying Chemical Principles - Questions - Page 280: 3

Answer

a) Image attached b) The most common oxidation state is +3. The Electron Configuration of Gd$^{3+}$ is [Xe]$4f^{7}$
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Work Step by Step

a) Image attached b) The most common oxidation state is +3 because it corresponds to the loss of the two $6s$ and one $5d$ electrons. If we use noble gas notation we get the Electron Configuration of Gd$^{3+}$ to be [Xe]$4f^{7}$
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