Chapter 2: Small Molecules and the Chemistry of Life

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

Multiple Choice

1. The calcium phosphate enamel on teeth from an animal skeleton is found to have a high ratio of ¹⁸O to ¹⁶O. From this information it can be assumed that the animal
2. experienced prolonged malnutrition.
3. experienced prolonged exposure to radioactivity.
4. lived in a region where it rained “heavy” water.
5. lived in a region where it rained “light” water.
6. had a diet that was high in cholesterol-rich meat.

Answer: c

Textbook Reference: 2.0 Chapter Introduction

Bloom’s Category: 3. Applying

2. The best reference source for the atomic number and mass number of elements is
3. a good chemistry text.
4. a dictionary.
5. the periodic table.
6. a general physics book.
7. a good biology text.

Answer: c

Textbook Reference: 2.1 How Does Atomic Structure Explain the Properties of Matter?

Bloom’s Category: 1. Remembering

3. Which component of an atom does not significantly add to its mass?
4. Proton
5. Neutron
6. Electron
7. Both a and b
8. All of the above

Answer: c

Textbook Reference: 2.1 How Does Atomic Structure Explain the Properties of Matter?

Bloom’s Category: 1. Remembering

4. What is the difference between an atom and an element?
5. An atom is made of protons, electrons, and (most of the time) neutrons; an element is composed of only one kind of atom.
6. An element is made of protons, electrons, and (most of the time) neutrons; an atom is composed of only one kind of element.
7. An atom does not contain electrons, whereas an element does.
8. An atom contains protons and electrons, whereas an element contains protons, electrons, and neutrons.
9. None of the above

Answer: a

Textbook Reference: 2.1 How Does Atomic Structure Explain the Properties of Matter?

Bloom’s Category: 2. Understanding

5. The number of protons in a neutral atom equals the number of
6. electrons.
7. neutrons.
8. electrons plus neutrons.
9. neutrons minus electrons.
10. isotopes.

Answer: a

Textbook Reference: 2.1 How Does Atomic Structure Explain the Properties of Matter?

Bloom’s Category: 1. Remembering