Chemistry (7th Edition)

Published by Pearson
ISBN 10: 0321943171
ISBN 13: 978-0-32194-317-0

Chapter 6 - Ionic Compounds: Periodic Trends and Bonding Theory - Section Problems - Page 219: 45

Answer

Iron

Work Step by Step

Iron has an electron configuration of $[Ar]4s^{2}3d^{5}$ When it is a 3+ ion then it's valence has a total of 5 electrons
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