Chapter 2, Problem 3A

(a)

Interpretation Introduction

Interpretation:The given structure needs to be identified as an atomic element, molecular element, and compound.

Concept introduction:Compound is defined as a substance that consists of two or more different elements that chemically combine in a fixed ratio by mass. A compound has new properties compared to its constituent elements.

Answer to Problem 3A

It is a compound.

Explanation of Solution

The given structure is made up of three atoms of two different elements. Hence, it is a compound. Examples of this type of molecules are ${\text{BeCl}}_{\text{2}}$ and ${\text{MgCl}}_{\text{2}}$ .

(b)

Interpretation Introduction

Interpretation: The given structure needs to be identified as an atomic element, molecular element, and compound.

Concept introduction:Compound is defined as a substance that consists of two or more different elements that chemically combine in a fixed ratio by mass. A compound has new properties compared to its constituent elements.

Answer to Problem 3A

It is a compound.

Explanation of Solution

The given structure is made up of three atoms of two different elements. Hence, it is a compound. Examples of this type of molecules are ${\text{H}}_{\text{2}}\text{O}$ and ${\text{H}}_{\text{2}}\text{S}$ .

(c)

Interpretation Introduction

Interpretation: The given structure needs to be identified as an atomic element, molecular element, and compound.

Concept introduction: A molecular element is a substance in which two or more atoms are bound together. Generally, they are diatomic nonmetals that exist as a molecule.

Answer to Problem 3A

It is a molecular element.

Explanation of Solution

The given structure is diatomic with the same atom bonded to each other. Hence, they are molecular elements (non-metals such as oxygen, nitrogen and fluorine are examples of this type).

(d)

Interpretation Introduction

Interpretation: The given structure needs to be identified as an atomic element, molecular element, and compound.

Concept introduction: An atomic element is present independently in the form of atoms and it can react with other elements to forma compound. They are monoatomic in nature.

Answer to Problem 3A

It is an atomic element.

Explanation of Solution

The given structure is monoatomic and Hence, it is an atomic element (metals such as copper, silver and gold are examples of this type).

(e)

Interpretation Introduction

Interpretation: The given structure needs to be identified as an atomic element, molecular element, and compound.

Concept introduction: A molecular element is a substance in which two or more atoms are bound together. Generally, they are diatomic non metals which exist as a molecule.

Answer to Problem 3A

It is an atomic element.

Explanation of Solution

The given structure is diatomic with same atom bonded to each other. Hence, they are molecular element (non-metals such as oxygen, nitrogen and fluorine are examples of this type).

(f)

Interpretation Introduction

Interpretation: The given structure needs to be identified as an atomic element, molecular element, and compound.

Concept introduction: Compound is defined a substance consists of two or more different elements which chemically combine in a fixed ratio by mass. A compound has new properties compare to its constituent elements.

Answer to Problem 3A

It is a compound.

Explanation of Solution

The given structure is made up of four atoms of two different elements. Hence, it is a compound. Example of this type of molecule is ${\text{H}}_{\text{2}}{\text{O}}_{\text{2}}$ .

(g)

Interpretation Introduction

Interpretation: The given structure needs to be identified as an atomic element, molecular element, and compound.

Concept introduction: An atomic element is present independently in the form of atoms and it can react with other elements to forma compound. They are monoatomic in nature.

Answer to Problem 3A

It is an atomic element.

Explanation of Solution

The given structure is monoatomic and Hence, it is an atomic element (metals such as copper, silver and gold are examples of this type).