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 - Exercises - Page 77: 2.61a



Work Step by Step

The overall charge of the compound must be neutral. The problem gives the charge of Calcium (Ca), +2, and the charge of Bromine (Br), -1. To cancel out the +2 of the Calcium ion, there must be two Bromine ions, for Bromine ions only have a charge of -1 while Calcium ions have a charge of +2. Thus, the compound is $CaBr_{2}$.
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