Chapter 2, Problem 55A

(a)

Interpretation Introduction

Interpretation: Name of the elements present in ammonia, ${\text{NH}}_{\text{3}}$ should be determined.

Concept Introduction: The simplest form of matter consisting unique set of properties is said to be elements. They are pure substances made up of only one type of atom.

The chemical combination of two or more elements in a fixed proportion results in the formation of a compound.

Answer to Problem 55A

Nitrogen and hydrogen.

Explanation of Solution

The chemical formula of the ammonia compound is ${\text{NH}}_{\text{3}}$ which means it is composed of one N atom and three H atoms. N and H are made up of only one type of atom so, the name of the elements present in ammonia, ${\text{NH}}_{\text{3}}$ is nitrogen, N and hydrogen, H.

(b)

Interpretation Introduction

Interpretation: Name of the elements present in potassium oxide, ${\text{K}}_{\text{2}}\text{O}$ should be determined.

Concept Introduction: The simplest form of matter consisting unique set of properties is said to be elements. They are pure substances made up of only one type of atom.

The chemical combination of two or more elements in a fixed proportion results in the formation of a compound.

Answer to Problem 55A

Potassium and oxygen.

Explanation of Solution

The chemical formula of the potassium oxide compound is ${\text{K}}_{\text{2}}\text{O}$ which means it is composed of two K atom and one O atom. K and O are made up of only one type of atom so, the name of the elements present in potassium oxide, ${\text{K}}_{\text{2}}\text{O}$ is potassium, K and oxygen, O.

(c)

Interpretation Introduction

Interpretation: Name of the elements present in sucrose, ${\text{C}}_{\text{12}}{\text{H}}_{22}{\text{O}}_{11}$ should be determined.

Concept Introduction: The simplest form of matter consisting unique set of properties is said to be elements. They are pure substances made up of only one type of atom.

The chemical combination of two or more elements in a fixed proportion results in the formation of a compound.

Answer to Problem 55A

Carbon, hydrogen and oxygen.

Explanation of Solution

The chemical formula of the sucrose compound is ${\text{C}}_{\text{12}}{\text{H}}_{22}{\text{O}}_{11}$ which means it is composed of twelve C, twenty-two H and eleven O atoms. C, H and O are made up of only one type of atom so, the name of the elements present in sucrose, ${\text{C}}_{\text{12}}{\text{H}}_{22}{\text{O}}_{11}$ is carbon, C, hydrogen, H and oxygen, O.

(d)

Interpretation Introduction

Interpretation: Name of the elements present in calcium sulfide, $\text{CaS}$ should be determined.

Concept Introduction: The simplest form of matter consisting unique set of properties is said to be elements. They are pure substances made up of only one type of atom.

The chemical combination of two or more elements in a fixed proportion results in the formation of a compound.

Answer to Problem 55A

Calcium and sulfur.

Explanation of Solution

The chemical formula of the calcium sulfide compound is $\text{CaS}$ which means it is composed of one Ca and one S atom. Ca and S are made up of only one type of atom so, the name of the elements present in calcium sulfide, $\text{CaS}$ is calcium, Ca and sulfur, S.