Chapter U2, Problem SI2RE

(a)

Interpretation Introduction

Interpretation: The Lewis dot structure and structural formula of SiF₄ needs to be drawn.

Concept Introduction: Valence electrons are involved in covalent bonding where sharing of electrons takes place.

Explanation of Solution

Lewis dot structure can be drawn with the help of valence electrons. Silicon has 4 valence electrons, Fluorine has 7 valence electrons. To complete the octet, Si will share 4 electrons, one electron each with fluorine.

Thus, the Lewis dot structure and structural formula of SiF₄is represented as follows:

(b)

Interpretation Introduction

Interpretation: The Lewis dot structure and structural formula of CO₂ needs to be drawn.

Concept Introduction: Valence electrons are involved in covalent bonding where sharing of electrons takes place.

Explanation of Solution

Lewis dot structure can be drawn with the help of valence electrons. Carbon has 4 valence electrons, oxygen has 6 valence electrons. To complete the octet, carbon will share 4 electrons, two electrons each with oxygen and form double covalent bond.

(c)

Interpretation Introduction

Interpretation: The Lewis dot structure and structural formula of CH₄ needs to be drawn.

Concept Introduction: Valence electrons are involved in covalent bonding where sharing of electrons takes place.

Explanation of Solution

Lewis dot structure can be drawn with the help of valence electrons. Carbon has 4 valence electrons, hydrogen has one valence electrons. To complete the octet, carbon will share 4 electrons, one electron each with hydrogen and form single covalent bond.

(d)

Interpretation Introduction

Interpretation: The Lewis dot structure and structural formula of SF₂ needs to be drawn.

Concept Introduction: Valence electrons are involved in covalent bonding where sharing of electrons takes place.

Explanation of Solution

Lewis dot structure can be drawn with the help of valence electrons. Sulphur has 6 valence electrons, Fluorine has 7 valence electrons. To complete the octet, sulphur will share 2 electrons, one electron each with fluorine and form single covalent bond.

(e)

Interpretation Introduction

Interpretation: The Lewis dot structure and structural formula of C₂H₄needs to be drawn.

Concept Introduction: Valence electrons are involved in covalent bonding where sharing of electrons takes place.

Explanation of Solution

Carbon has 4 valence electrons, hydrogen has one valence electrons. To complete the octet, carbon will share 4 electrons, one electron each with hydrogen and form single covalent bond.

When carbon shares two electrons with other carbon atom, it forms double bond.

(f)

Interpretation Introduction

Interpretation: The Lewis dot structure and structural formula of C₂H₂ needs to be drawn.

Concept Introduction: Valence electrons are involved in covalent bonding where sharing of electrons takes place.

Explanation of Solution

Carbon has 4 valence electrons, hydrogen has one valence electrons. To complete the octet, carbon will share 4 electrons, one electron each with hydrogen and form single covalent bond.

When carbon share three electrons with other carbon atom, it forms triple bond.

(g)

Interpretation Introduction

Interpretation: The Lewis dot structure and structural formula of C₂H₆needs to be drawn.

Concept Introduction: Valence electrons are involved in covalent bonding where sharing of electrons takes place.

Explanation of Solution

Carbon has 4 valence electrons, hydrogen has one valence electrons. To complete the octet, carbon will share 4 electrons, one electron each with hydrogen and form single covalent bond.