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Suppose that when drawing a Lewis structure for a molecule, you end up with a structure in which the central atom lacks an octet. What should you do? a. Add more electrons to give the central atom an octet. b. Remove the central atom from the Lewis structure. c. Move a lone pair from a terminal atom to a lone pair position on the central atom. d. Form a multiple bond by moving a lone pair from a terminal atom to the bonding region between the terminal atom and the central atom.

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Chemistry In Focus

6th Edition
Tro + 3 others
Publisher: Cengage Learning
ISBN: 9781305084476

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Chapter
Section
BuyFindarrow_forward

Chemistry In Focus

6th Edition
Tro + 3 others
Publisher: Cengage Learning
ISBN: 9781305084476
Chapter 5, Problem 3SC
Textbook Problem
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Suppose that when drawing a Lewis structure for a molecule, you end up with a structure in which the central atom lacks an octet. What should you do?

a. Add more electrons to give the central atom an octet.

b. Remove the central atom from the Lewis structure.

c. Move a lone pair from a terminal atom to a lone pair position on the central atom.

d. Form a multiple bond by moving a lone pair from a terminal atom to the bonding region between the terminal atom and the central atom.

Interpretation Introduction

Interpretation:

A Lewis structure for a molecule in which the central atom lacks an octet is to be explained.

Concept introduction:

In Lewis structures, dots are used to represent the valence electrons.

Structures with octets (eight dots) or duets (two dots) are stable configurations.

The atoms in a molecule are linked together with each other through chemical bonds formed by the transfer or sharing of valence electrons of the atoms. The atoms tend to attain octet in order to gain stability.

Atoms can share more than one electron pair to form a complete octet resulting in multiple bonds.

Explanation of Solution

Reason for correct option:

Atoms can form multiple bonds in order to complete their octets by sharing their lone pairs. They move their lone pair from a terminal atom to the bonding region to form multiple bonds. Thus, each atom in the molecule gets its octet completed.

Hence, option (d) is correct.

Reason for incorrect options:

Option (a) is incorrect because in a Lewis ...

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Chapter 5 Solutions

Chemistry In Focus
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