Chapter 2Atoms: Are They for Real?

James A. Noblet

California State University

San Bernardino, CA

2007 Prentice Hall

Chemistry for Changing Times, 11th edition

John W. Hill and Doris K. Kolb

The term atom comes from the Greek word atomos, which means:

1. Very small

2. Cannot be seen

3. Cannot be cut

4. Basis

5. Reactive

The term atom comes from the Greek word atomos, which means:

1. Very small

2. Cannot be seen

3. Cannot be cut

4. Basis

5. Reactive

The fact that 4g of hydrogen (H2) reacts with 32g of oxygen (O2) to give 36g of water is an illustration of what law?

1. Conservation of mass

2. Law of definite proportions

3. Law of multiple proportions

4. Law of combining elements

5. The periodic law

The fact that 4g of hydrogen (H2) reacts with 32g of oxygen (O2) to give 36g of water is an illustration of what law?

1. Conservation of mass

2. Law of definite proportions

3. Law of multiple proportions

4. Law of combining elements

5. The periodic law

The tarnish on silverware is primarily silver sulfide, which always forms with a 2:1 ratio of Ag to S. This an example

of what principle?

1. Conservation of mass

2. Law of definite proportions

3. Law of multiple proportions

4. Law of combining elements

5. The periodic law

The tarnish on silverware is primarily silver sulfide, which always forms with a 2:1 ratio of Ag to S. This an example

of what principle?

1. Conservation of mass

2. Law of definite proportions

3. Law of multiple proportions

4. Law of combining elements

5. The periodic law

Carbon and oxygen can react to form carbon monoxide (CO) or carbon dioxide (CO2) depending on the amount of

oxygen available. This illustrates which law?

1. Conservation of mass

2. Law of definite proportions

3. Law of multiple proportions

4. Law of combining elements

5. The periodic law

Carbon and oxygen can react to form carbon monoxide (CO) or carbon dioxide (CO2) depending on the amount of

oxygen available. This illustrates which law?

1. Conservation of mass

2. Law of definite proportions

3. Law of multiple proportions

4. Law of combining elements

5. The periodic law

Mendeleev arranged the elements in his early periodic table primarily according to what criterion?

1. Similar physical properties

2. Similar chemical properties

3. Decreasing atomic masses

4. Similar appearance

5. Natural abundance

Mendeleev arranged the elements in his early periodic table primarily according to what criterion?

1. Similar physical properties

2. Similar chemical properties

3. Decreasing atomic masses

4. Similar appearance

5. Natural abundance