Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 2 - Atoms, Molecules, and Ions - Additional Exercises: 2.104c

Answer

chromium (III) oxide +3

Work Step by Step

$Cr_2O_3$ $Cr$ is chromium. $O$ is oxygen, which his called oxide when naming compounds. Oxygen has a charge of -2. The compound is neutral, so the charge/oxidation number of the manganese element was +3. (The 3 oxygen atoms contributed a -6 charge, which must be offset by a +6 charge from the chromium. There are 2 chromium atoms, so +3 each.) The name is written as element(oxidation number) element so $Cr_2O_3$ is chromium (III) oxide.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.