1. CHEMISTRY TEST REVIEW

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

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

4. 3. Which of the following is not an element? a. oxygen c. sodium chloride b. hydrogen d. nitrogen

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

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

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

8. 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

9. 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.

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

11. 10. The elements oxygen, sulfur, selenium and tellurium are all found in the same group (16) on the table. What do we know about the elements in that family? The have similar but not identical properties Periodic Table of Elements

12. 11. In what family is neon found? Group 18 12. What do we call those elements in that group? Noble Gases 13. Describe a property of those elements. Very nonreactive/inert

13. 14. What element is in Group 16, Period 3? S 15. How many protons does an atom of this element have? 16 16. What kind of element is it? nonmetal

14. 17. Which element is a metalloid? a. S (Sulfur) c. Si (Silicon) b. Ba (Barium) d. Br (Bromine)

15. 18. What are the physical properties of metals? Ductile (wires) Malleable (hammer) Good conductors of heat and electricity Have luster

16. 19. What are the physical properties of nonmetals? Brittle (break) No luster Poor conductors of heat and electricity.

17. 20. Identify the following: A. Atomic # 6 B. Atomic mass 12.011 C. Mass # 12 D. # of protons 6 E. # of electrons 6 F. # of neutrons 12-6 = 6

18. 5 B Boron 10.81 2 He Helium 4.003 11 Na Sodium 22.990 17 Cl Chlorine 35.453 21. What is the atomic number for Chlorine? 22. What is the atomic mass for Boron? 23. How many protons are in an atom of Na? 24. How many neutrons are in an atom of He? 17 10.81 11 2 Use the information provided to answer the questions.

19. 25. I am a member of the Boron family with 49 protons. 26. I have a total of 74 electrons in an atom. 27. I have an atomic mass of 55.847. 28. I have 8 neutrons in an atom. In W Fe O Use a periodic table to help you identify each element. Give its symbol for the answer.

20. 29. Elements that are ductile, malleable and good conductors of heat are known as a. Nonmetals c. Metals b. Noble Gasesd. Metalloids

21. 30. Elements brittle are known as a. Nonmetals c. Metals b. Noble Gasesd. Metalloids

22. 31. Elements that have luster are known as a. Nonmetals c. Metals b. Noble Gasesd. Metalloids

23. 32. Elements in the periodic table are arranged by a.atomic number b.atomic weight c.number of neutrons d.chemical reactivity

24. 33. Elements at the left of the periodic table are known as a. Nonmetals c. Metals b. Noble Gasesd. Metalloids

25. 34. Elements at the right of the periodic table are known as a. Nonmetals c. Metals b. Noble Gasesd. Metalloids

26. 35. In sweetened tea, the sugar is called the a. solute.c. solvent. b. colloid. d. solution.

27. 36. Which of the following would help sugar dissolve faster in water? a. stirring the water b. decreasing the solubility of sugar c. using larger particles of sugar d. decreasing the water temperature

28. 37. Describe the difference between a soluble and insoluble substance. Soluble: can dissolve Insoluble: cannot be dissolved

29. 38. 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.

30. 39. What is the solubility of KCl at 40°C? 40 g salt/100g water 40. What is the solubility of NaCl at 10°C? 35 g salt/100g water 41. What is the solubility of K 2 Cr 2 O 7 at 80°C? 58 g salt/100g water Solubility Curves

31. 42. PHYSICAL OR CHEMICAL CHANGE? PHYSICAL

32. 43. PHYSICAL OR CHEMICAL CHANGE? CHEMICAL

33. 44. PHYSICAL OR CHEMICAL CHANGE? CHEMICAL

34. 45. PHYSICAL OR CHEMICAL CHANGE? PHYSICAL

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

36. Heat (thermal energy) Temperature º C. 100 0 A B C D E melting freezing condensing boiling 47. Label the phase changes in the heating curve below:

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

38. 49. The particles of a substance move most readily in a. a solid b. a liquid c. a gas

39. 50. 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

40. 51. When a liquid becomes a solid, energy a. does not change b. is released c. is absorbed d. is first absorbed, then released

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

42. 53. The change of a liquid to a solid is called a. freezing c. melting b. sublimationd. vaporization

43. 54. During which of the following processes is there a decrease in the heat content of the form of water indicated? a. Ice as it forms on a lake b. Water droplets as they fall to the ground c. Water as it evaporates from a pond d. Snow as it melts on a mountainside

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

45. Click on the links below to review : Phases of Matter http://www.harcourtschool.com/activity/states_o f_matter/ Mixtures http://www.harcourtschool.com/activity/mixture/ mixture.html

46. gas liquid solid condensation Freezing evaporation melting sublimation

47. temperature heat It increases Stays the same Its melting 0 and 100 degrees Celsius Stays the same

48. 80°C 20°C liquid The move faster and farther apart. No, because the melting point of water is 0°C and the boiling point is 100°C

49. The slow down and come closer together. Heat must be removed/released. Temperature does not change during a phase change. 0°C solid freezing liquid condensatio n gas