Chemistry: Molecular Approach (4th Edition)

Published by Pearson
ISBN 10: 0134112830
ISBN 13: 978-0-13411-283-1

Chapter 3 - Self-Assessment Quiz - Page 127: Q3


The correct answer is (a)

Work Step by Step

The calcium ion has a +2 charge, and the sulfide ion has a -2 charge. To balance the charges, one atom of calcium reacts with one atom of sulfur to form $CaS$. So, the correct answer is (a).
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