Chapter 8, Problem 126A

(a)

Interpretation Introduction

Interpretation:

The Lewis dot structure of ${\text{SeF}}_{\text{2}}$ needs to be drawn.

Concept introduction:

Lewis structure represents the valence shell electrons in a compound. It shows the distribution of electrons around each atom in a molecule.

Explanation of Solution

Selenium is a 16^th group element which has 6 valence electrons and fluorine is a 17^th group element which has 7 valence electrons.

Total valence electrons = 6 + 2×7

= 6 + 14

= 20

Therefore; the total valence electron is 20.

The Lewis dot structure of SeF₂ is shown below:

(b)

Interpretation Introduction

Interpretation:

The Lewis dot structure of ${\text{ClO}}_2{}^{-}$ needs to be drawn.

Concept introduction:

Lewis structure represents the valence shell electrons in a compound. It shows the distribution of electrons around each atom in a molecule.

Explanation of Solution

Chlorine is a 17^th group element which has 7 valence electrons and oxygen is a 16^th group element which has 6 valence electrons.

Total valence electrons = 7 + 2×6 + 1

= 20

Therefore; the total valence electrons is 20.

The Lewis dot structure is shown below:

(c)

Interpretation Introduction

Interpretation:

The Lewis dot structure of $\text{PO}{}_3{}^{3-}$ needs to be determined.

Concept introduction:

Lewis structure represents the valence shell electrons in a compound. It shows the distribution of electrons around each atom in a molecule.

Explanation of Solution

Phosphorus is a 15^th group element which has 5 valence electrons and oxygen is a 16^th group element which has 6 valence electrons.

The total number of valence electrons = 5 + 3(6) + 3 = 26

Therefore; the total valence electron is 20

The Lewis dot structure is shown below:

(d)

Interpretation Introduction

Interpretation:

The Lewis dot structure of ${\text{POCl}}_{\text{3}}$ needs to be drawn.

Concept introduction:

Lewis structure represents the valence shell electrons in a compound. It shows the distribution of electrons around each atom in a molecule.

Explanation of Solution

Phosphorus is a 15^th group element which has 5 valence electrons and oxygen is a 16^th group element which has 6 valence electron and chlorine is a 17^th group element which has 7 valence electrons.

Total number of valence electrons = 5 + 6 + 3(7)

= 5+ 6+ 21

= 32

Therefore; the total valence electron is 32

The Lewis dot structure is shown below:

(e)

Interpretation Introduction

Interpretation:

The Lewis dot structure of ${\text{GeF}}_{\text{4}}$ needs to be drawn.

Concept introduction:

Lewis structure represents the valence shell electrons in a compound. It shows the distribution of electrons around each atom in a molecule.

Explanation of Solution

Germanium is a 14^th group element which has 4 valence electrons and fluorine is a 17^th group element which has 7 valence electrons.

The total valence electron = 4+ 4(7)

= 4 + 28

= 32

Therefore; the total valence electron is 32

The Lewis dot structure is shown below: