Chapter 1, Problem 1E

(a)

Interpretation Introduction

Concept introduction: The space filling molecular models represent the atoms and compounds. The same structures indicate the same atoms or compounds. Each sphere indicates an atom and the attached spheres indicate the compound.

Answer to Problem 1E

Solution: Figure (i)

Explanation of Solution

The figure (i) represents the space filling molecular models of two spheres attached to each other with the same color.

Therefore, figure (i) indicate the diatomic molecule of the same atoms in it. Thus, it corresponds to a pure element.

Conclusion

Figure (i) represent the structure corresponding to pure element.

(b)

Interpretation Introduction

Concept introduction: The space filling molecular models represent the atoms and compounds. The same structures indicate the same atoms or compounds. Each sphere indicates an atom and the attached spheres indicate the compound.

Answer to Problem 1E

Solution: The figures that represent a mixture of two elements are (v) and (vi).

Explanation of Solution

The figures (v) and (vi) represent the space filling molecular models of two differently colored spheres apart from each other.

Therefore, it does not indicate any compound. Instead, it indicates the mixture of two different elements.

Conclusion

Figure (v) and (vi) represent the structures corresponding to a mixture of two elements.

(c)

Interpretation Introduction

Concept introduction: The space filling molecular models represent the atoms and compounds. The same structures indicate the same atoms or compounds. Each sphere indicates an atom and the attached spheres indicate the compound.

Answer to Problem 1E

Solution: The figure that represents a pure compound is (iv).

Explanation of Solution

The figure (iv) represents the space filling molecular models of two spheres attached to each other with the different colors.

Therefore, figure (iv) indicates the diatomic molecule of the different atoms in it. Thus, it corresponds to a pure compound.

Conclusion

Figure (iv) represents the structure corresponding to pure compound.

(d)

Interpretation Introduction

Concept introduction: The space filling molecular models represent the atoms and compounds. The same structures indicate the same atoms or compounds. Each sphere indicates an atom and the attached spheres indicate the compound.

Answer to Problem 1E

Solution: The figures that represent a mixture of an element and a compound are (ii) and (iii).

Explanation of Solution

The figure (ii) represents a space filling molecular model of a diatomic molecule with two spheres of same color attached to each other and a compound with two spheres of different color attached to each other.

Therefore, figure (ii) represents a mixture of diatomic molecule of pure element and a compound.

The figure (iii) represents a space filling molecular model of a monatomic sphere with single spheres of same color apart from each other and a compound with two spheres of different color attached to each other.

Therefore, figure (iii) represents atoms of pure element and a compound.

Conclusion

Figure (ii) and (iii) represent the structures corresponding to a mixture of an element and a compound.