Lewis formulas for the given molecules are to be drawn, and all the unshared pairs of electrons are to be shown. Concept introduction: The total number of valence electrons based on the molecular formula are first determined. Bonded atoms are connected by a shared electron pair shown by a dash. The number of electrons in the bonds is subtracted from the total number of valence electrons. This gives the number of electrons that remain to be added. Electrons are added as unshared electron pairs so that the most electronegative atoms have eight electrons around them. Second-row elements cannot have more than eight valence electrons.

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Chapter 1.3, Problem 6P

Interpretation Introduction

Interpretation:

Lewis formulas for the given molecules are to be drawn, and all the unshared pairs of electrons are to be shown.

Concept introduction:

The total number of valence electrons based on the molecular formula are first determined.

Bonded atoms are connected by a shared electron pair shown by a dash.

The number of electrons in the bonds is subtracted from the total number of valence electrons. This gives the number of electrons that remain to be added.

Electrons are added as unshared electron pairs so that the most electronegative atoms have eight electrons around them.

Second-row elements cannot have more than eight valence electrons.

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