Answer
Element X is from group 5A.
Work Step by Step
The compound needs an ion with a -3 charge. Group 5A has the charge necessary.
Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)
by Timberlake, Karen C.
Published by
Prentice Hall
ISBN 10:
0321908449
ISBN 13:
978-0-32190-844-5
Chapter 6 - Section 6.8 - Attractive Forces in Compounds - Challenge Questions - Page 206: 6.118c
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