Chemistry: The Molecular Nature of Matter and Change 7th Edition

Published by McGraw-Hill Education
ISBN 10: 007351117X
ISBN 13: 978-0-07351-117-7

Chapter 23 - Problems: 23.34

Answer

See explanation below.

Work Step by Step

Gadolinium, Gd a lanthanide element has electronic configuration as[Xe]6s2 4f7 5d1.This shows that it has 8 unpaired electrons.But the ion Gd3+ electronic configuration is [Xe] 4f7.
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