CHEMISTRY 1 TEST REVIEW

1. Label the parts of the atom below. electron neutron proton nucleus

2. All matter is made up of a. cells b. atoms c. molecules d. compounds

3. Which of the following is not an element? a. Cl c. NaCl b. N d. Na

4. A positively charged particle is a. an electron c. a neutron b. a proton d. an isotope

5. Which of the following would be found outside the nucleus of an atom? a. protons b. electrons c. neutrons d. protons and neutrons

6. A chemical formula like CO 2 represents a. an elementc. an atom b. an electron d. a compound

7. A substance made up of two or more elements that have chemically combined is a. a mixture c. an atom b. a compound d. an element

8. A substance that cannot be changed into simpler substances by a chemical change is called a (an) a. element. c. liquid. b. solid. d. mixture.

9. Al, Cu, N, and O are symbols for a. compounds. c. elements. b. mixtures. d. molecules.

10. When 2 or more substances are physically combined, a(n) _____ is produced a. compound c. element b. mixture d. molecule

11. The smallest part of a compound is called a(n) a. compound c. element b. mixture d. molecule

12. Sand and iron particles that are similar in size and color are mixed together in a beaker. What would be the best method of separating the particles? a. Use tweezers to separate them. b. Add water to the mixture. c. Use a magnet to separate them. d. Pour the mixture into a filter.

13. Identify each example below as a physical or chemical property: a.The object has a mass of 5gm b.Sodium reacts with water. c.Silver is a shiny metal. d.The iron rusts when exposed to water. e.The fabric is flammable. f.Mercury is a liquid at room temperature. PHYSICAL CHEMICAL PHYSICAL CHEMICAL PHYSICAL

14. PHYSICAL OR CHEMICAL CHANGE? PHYSICAL

15. PHYSICAL OR CHEMICAL CHANGE? CHEMICAL

16. PHYSICAL OR CHEMICAL CHANGE? CHEMICAL

17. PHYSICAL OR CHEMICAL CHANGE? PHYSICAL

18. Identify the solid, liquid and gas! Explain your answer. Gas Molecules very far apart Solid Molecules packed close together Liquid Molecules a little farther apart

19. The particles of a substance are closest together in a. a solid b. a liquid c. a gas d. plasma

20. The particles of a substance move the fastest in a. a solid b. a liquid c. a gas

21. The particles of a substance that does not have a definite volume or shape is a. a solid c. a liquid b. a gas d. plasma

22. When a liquid becomes a solid, a. it melts b. it condenses c. it freezes d. it evaporates

23. _______ is the process in which liquid changes to gas. a. Sublimation c. Condensation b. Evaporationd. Melting

24. The change of a solid to a gas is called a. freezing c. melting b. sublimationd. vaporization

25. When substances go directly from the solid phase to the gas phase, the phase change is called a. sublimationc. condensation b. evaporationd. vaporization