Chemistry: The Central Science (13th Edition)

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

Chapter 9 - Molecular Geometry and Bonding Theories - Exercises - Page 390: 9.21b

Answer

HCN has one lone pair.

Work Step by Step

One lone pair on N is not involved in the triple bond with C.
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