Ch. 2: “Matter”Ch. 2: “Matter”

Section 2.1 Review: “What Is Section 2.1 Review: “What Is Matter?”Matter?”

1. Define chemistry.1. Define chemistry.

Chemistry is the study of matter Chemistry is the study of matter and how it changes.and how it changes.

2. List the two types of 2. List the two types of pure substances.pure substances. ElementsElements CompoundsCompounds

3. Explain why light is 3. Explain why light is not matter.not matter. Light has neither mass nor Light has neither mass nor

volume.volume.

4. Complete the following analogy: A 4. Complete the following analogy: A heterogeneous mixture is to a heterogeneous mixture is to a homogeneous mixture as immiscible homogeneous mixture as immiscible liquids are to ___.liquids are to ___.

miscible liquidsmiscible liquids

5. Classify each of the 5. Classify each of the following as an element or a following as an element or a compound:compound:a. sulfur, Sa. sulfur, S88

elementelementb. methane, CHb. methane, CH44

compoundcompound

c. carbon monoxide, COc. carbon monoxide, CO compoundcompound

d. cobalt, Cod. cobalt, Co elementelement

6. Describe the makeup of 6. Describe the makeup of pure water, and write its pure water, and write its chemical formula.chemical formula. Water contains two hydrogen Water contains two hydrogen

atoms and one oxygen atom; Hatoms and one oxygen atom; H22O.O.

7. Compare and contrast 7. Compare and contrast mixtures and pure mixtures and pure substances. Give an substances. Give an example of each.example of each. A pure substance, such a table A pure substance, such a table

salt (NaCl), has the same salt (NaCl), has the same composition throughout and composition throughout and definite properties.definite properties.

A mixture, such as air, contains A mixture, such as air, contains more than one pure substance more than one pure substance with various compositions.with various compositions.

8. Critical Thinking8. Critical Thinking

David’s statement reflects the David’s statement reflects the common use of common use of purepure. Susan’s use . Susan’s use of pure is more correct of pure is more correct scientifically because honey is a scientifically because honey is a mixture of several different mixture of several different compounds.compounds.