Chemistry (4th Edition)

Published by McGraw-Hill Publishing Company
ISBN 10: 0078021529
ISBN 13: 978-0-07802-152-7

Chapter 9 - Section 9.1 - Molecular Geometry - Checkpoint: 9.1.2

Answer

b) tetrahedral, trigonal pyramidal

Work Step by Step

The arrangement of electrons that allows for minimal repulsion, in accordance with VSEPR theory, for molecules with one central atom and four electron pairs is tetrahedral. Since one of the pairs in this molecule is a lone pair, one of the electron sites is not expressed in the molecular geometry so it is trigonal pyramidal.
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