Chapter 8, Problem 58A

(a)

Interpretation Introduction

Interpretation:

Electron dot structure of ${\text{NH}}_{\text{3}}$

Concept Interpretation:

Diagrams that show the chemical bonding between atoms in a molecule are known as Lewis’s dot structures, also known as electron dot structures.

Answer to Problem 58A

One nitrogen ( $\text{N}$ ) atom and three hydrogen ( $\text{H}$ ) atoms make up the Lewis structure of ammonia ( ${\text{NH}}_{\text{3}}$ ). Three bond pairs and one lone pair are present in ${\text{NH}}_{\text{3}}$ Lewis’s structure.

  

Explanation of Solution

Nitrogen has a total of $\text{5}$

valence electrons and hydrogen has a total of one valence electron. The Lewis structure is as follows:

  

(b)

Interpretation Introduction

Interpretation:

Electron dot structure of $\text{BrCl}$ is to be determined.

Concept Interpretation:

Diagrams that show the chemical bonding between atoms in a molecule are known as Lewis’s dot structures, also known as electron dot structures.

Answer to Problem 58A

One Bromine ( $\text{Br}$ ) and one Chlorine ( $\text{Cl}$ ) atoms make up the $\text{BrCl}$ Lewis structure, and there is only one bond between them. Both the bromine ( $\text{Br}$ ) and chlorine ( $\text{Cl}$ ) atoms have three lone pairs.

  

Explanation of Solution

The number of valence electrons in bromine is seven and chlorine contains $\text{7}$ valence electrons. The Lewis structure is as follows:

  

(c)

Interpretation Introduction

Interpretation:

Electron dot structure of ${\text{H}}_{\text{2}}{\text{S}}_{\text{2}}$ .

Concept Interpretation:

Diagrams that show the chemical bonding between atoms in a molecule are known as Lewis’s dot structures, also known as electron dot structures.

Answer to Problem 58A

Two sulfur ( $\text{S}$ ) atoms occupy the central position in the Lewis structure ${\text{H}}_{\text{2}}{\text{S}}_{\text{2}}$ . There is a total of $\text{4}$ lone pairs and $\text{3}$ bond pairs in the ${\text{H}}_{\text{2}}{\text{S}}_{\text{2}}$ Lewis structure.

  

Explanation of Solution

Two sulfur ( $\text{S}$ ) atoms occupy the central position in the Lewis structure ${\text{H}}_{\text{2}}{\text{S}}_{\text{2}}$ . There is a total of $\text{4}$ lone pairs and $\text{3}$ bond pairs in the ${\text{H}}_{\text{2}}{\text{S}}_{\text{2}}$ .

  

(d)

Interpretation Introduction

Interpretation:

Electron dot structure of ${\text{SiH}}_{\text{4}}$ .

Concept Interpretation:

Diagrams that show the chemical bonding between atoms in a molecule are known as Lewis’s dot structures, also known as electron dot structures.

Answer to Problem 58A

The center atom is the silicon which contains four valance electrons while the hydrogen atoms have one valance electron.

  

Explanation of Solution

In the SiH4 molecule, the core silicon atom has four valence electrons and the hydrogen atom has one.

The SiH4 molecule has no formal charge.