Chapter U2.4, Problem 6E

(a)

Interpretation Introduction

Interpretation: The number of lone pairs in TeCl₂ molecule needs to be determined.

Concept Introduction:

Lewis dot structure or electron dot structure can be defined as the structure of a molecule in which all the valence electrons and lone pairs on each atom is represented with the help of line and dot or cross.

The Lewis structure is used to predict the hybridization and molecular geometry of the molecule as it gives complete idea about the bonding between bonded atoms in a molecule.

Answer to Problem 6E

8 lone pairs;

Explanation of Solution

The number of lone pairs in any molecule can be determined with the help of Lewis structure. In the Lewis structure of TeCl₂ molecule;

Number of valence electrons in Te = 6 electrons

Number of valence electrons in Cl = 7

Total number of valence electrons = 6 + (2 x 7) = 20 electrons.

Thus the Lewis structure must be:

  

Hence in TeCl₂ molecule there are 8 lone pairs.

(b)

Interpretation Introduction

Interpretation: The number of lone pairs in HI molecule needs to be determined.

Concept Introduction:

Lewis dot structure or electron dot structure can be defined as the structure of a molecule in which all the valence electrons and lone pairs on each atom is represented with the help of line and dot or cross.

The Lewis structure is used to predict the hybridization and molecular geometry of the molecule as it gives complete idea about the bonding between bonded atoms in a molecule.

Answer to Problem 6E

3 lone pairs;

Explanation of Solution

The number of lone pairs in any molecule can be determined with the help of Lewis structure. In the Lewis structure of HI molecule;

Number of valence electrons in I = 7 electrons

Number of valence electrons in H= 1

Total number of valence electrons = 1 + (1 x 7) = 8 electrons.

Thus the Lewis structure must be:

  

Hence in HI molecule there are 3 lone pairs.

(c)

Interpretation Introduction

Interpretation: The number of lone pairs in AsBr₃molecule needs to be determined.

Concept Introduction:

Lewis dot structure or electron dot structure can be defined as the structure of a molecule in which all the valence electrons and lone pairs on each atom is represented with the help of line and dot or cross.

The Lewis structure is used to predict the hybridization and molecular geometry of the molecule as it gives complete idea about the bonding between bonded atoms in a molecule.

Answer to Problem 6E

10 lone pairs;

Explanation of Solution

The number of lone pairs in any molecule can be determined with the help of Lewis structure. In the Lewis structure of AsBr₃ molecule;

Number of valence electrons in As = 5 electrons

Number of valence electrons in Br = 7

Total number of valence electrons = 5 + (3 x 7) = 26 electrons.

Thus the Lewis structure must be:

  

Hence in AsBr₃ molecule there are 10 lone pairs.

(d)

Interpretation Introduction

Interpretation: The number of lone pairs in SiF₄ molecule needs to be determined.

Concept Introduction:

Lewis dot structure or electron dot structure can be defined as the structure of a molecule in which all the valence electrons and lone pairs on each atom is represented with the help of line and dot or cross.

The Lewis structure is used to predict the hybridization and molecular geometry of the molecule as it gives complete idea about the bonding between bonded atoms in a molecule.

Answer to Problem 6E

12 lone pairs;

Explanation of Solution

The number of lone pairs in any molecule can be determined with the help of Lewis structure. In the Lewis structure of SiF₄ molecule;

Number of valence electrons in Si = 4 electrons

Number of valence electrons in F = 7

Total number of valence electrons = 4 + (4 x 7) = 32 electrons.

Thus the Lewis structure must be:

  

Hence in SiF₄ moleculethere are 12 lone pairs.

(e)

Interpretation Introduction

Interpretation: The number of lone pairs in F₂ molecule needs to be determined.

Concept Introduction:

Lewis dot structure or electron dot structure can be defined as the structure of a molecule in which all the valence electrons and lone pairs on each atom is represented with the help of line and dot or cross.

The Lewis structure is used to predict the hybridization and molecular geometry of the molecule as it gives complete idea about the bonding between bonded atoms in a molecule.

Answer to Problem 6E

6 lone pairs;

Explanation of Solution

The number of lone pairs in any molecule can be determined with the help of Lewis structure. In the Lewis structure of F₂ molecule;

Number of valence electrons in F = 7

Total number of valence electrons = (2x 7) = 14 electrons.

Thus the Lewis structure must be:

  

Hence in F₂ molecule there are 6 lone pairs.