Chapter 5, Problem 5.42QP

(a)

Interpretation Introduction

Interpretation:

From the given chemical formula, whether it is a compound or element has to be identified.

Concept introduction:

• Compound is a chemical substance having combination of various elements in a definite ratio held together via chemical bonds.
• Element is a chemically unbreakable simplest form of matter.  It is composed of only single type of atom with same atomic number for all the atoms present in it.

To identify: whether ${\text{P}}_{\text{4}}$ is an element or a compound.

(b)

Interpretation Introduction

Interpretation:

From the given chemical formula, whether it is a compound or element has to be identified.

Concept introduction:

• Compound is a chemical substance having combination of various elements in a definite ratio held together via chemical bonds.
• Element is a chemically unbreakable simplest form of matter.  It is composed of only single type of atom with same atomic number for all the atoms present in it.

To identify: whether ${\text{PH}}_{\text{3}}$ is an element or a compound.

(c)

Interpretation Introduction

Interpretation:

From the given chemical formula, whether it is a compound or element has to be identified.

Concept introduction:

• Compound is a chemical substance having combination of various elements in a definite ratio held together via chemical bonds.
• Element is a chemically unbreakable simplest form of matter.  It is composed of only single type of atom with same atomic number for all the atoms present in it.

To identify: whether ${\text{N}}_{\text{2}}\text{O}$ is an element or a compound.

(d)

Interpretation Introduction

Interpretation:

From the given chemical formula, whether it is a compound or element has to be identified.

Concept introduction:

• Compound is a chemical substance having combination of various elements in a definite ratio held together via chemical bonds.
• Element is a chemically unbreakable simplest form of matter.  It is composed of only single type of atom with same atomic number for all the atoms present in it.

To identify: whether ${\text{C}}_{\text{6}}{\text{H}}_{\text{6}}$ is an element or a compound.

(e)

Interpretation Introduction

Interpretation:

From the given chemical formula, whether it is a compound or element has to be identified.

Concept introduction:

• Compound is a chemical substance having combination of various elements in a definite ratio held together via chemical bonds.
• Element is a chemically unbreakable simplest form of matter.  It is composed of only single type of atom with same atomic number for all the atoms present in it.

To identify : whether $\text{Hg}$ is an element or a compound.

(f)

Interpretation Introduction

Interpretation:

From the given chemical formula, whether it is a compound or element has to be identified.

Concept introduction:

• Compound is a chemical substance having combination of various elements in a definite ratio held together via chemical bonds.
• Element is a chemically unbreakable simplest form of matter.  It is composed of only single type of atom with same atomic number for all the atoms present in it.

To identify: whether ${\text{Cl}}_{\text{2}}$ is an element or a compound.

(g)

Interpretation Introduction

Interpretation:

From the given chemical formula, whether it is a compound or element has to be identified.

Concept introduction:

• Compound is a chemical substance having combination of various elements in a definite ratio held together via chemical bonds.
• Element is a chemically unbreakable simplest form of matter.  It is composed of only single type of atom with same atomic number for all the atoms present in it.

To identify: whether ${\text{N}}_{\text{2}}$ is an element or a compound.

(h)

Interpretation Introduction

Interpretation:

From the given chemical formula, whether it is a compound or element has to be identified.

Concept introduction:

• Compound is a chemical substance having combination of various elements in a definite ratio held together via chemical bonds.
• Element is a chemically unbreakable simplest form of matter.  It is composed of only single type of atom with same atomic number for all the atoms present in it.

To identify: whether ${\text{PCl}}_{\text{5}}$ is an element or a compound.