Chemistry Test 4

Answer the following questions. When you are done, click the Check Answers button at the bottom
1. Water is an example of a/an: a. base b. atom c. molecule d. element e. No answer
2. The smallest piece of a substance that has all the chemical properties of that substance is called a/n ? a. electron b. atom c. molecule d. element e. No answer
3. What do you get when you dissolve one substance in another? a. solution b. mixture c. element d. chemical equation e. No answer
4. Al , Cu , N , O , are all symbols for: a. elements b. compounds c. molecules d. mixtures e. No answer
5. Which can be separated into simpler substances by a chemical change only? a. an element b. a compound c. a solid d. a mixture e. No answer
6. When salt is dissolved in water, a: a. chemical reaction occurs. b. a homogeneous mixture or solution is formed. c. a heterogeneous mixture forms. d. a compound is formed. e. No answer
7. The fact that Iron cannot be changed into a simpler form tells you that Iron is: a. an element b. a compound c. a molecule d. a mixture e. No answer
8. When two or more substances are mixed but not chemically combined, they form a: a. element b. compound c. phase change d. mixture e. No answer
9. Substances in a mixture can be separated by physical means because: a. no chemical change has happened. b. physical and chemical properties have changed. c. only physical properties have changed. d. only chemical properties have changed. e. No answer
10. A summary of the experimental method to be used during an experiment is called: a. the procedure b. the problem c. the experimental design d. the observations e. No answer