1. Chemistry Unit Review

2. Which of the following is ordered from the least mass to the greatest mass? Protons, neutrons, electrons Neutrons, protons, electrons Electrons, neutrons, protons None of the above.

3. Which of the following is ordered from the least mass to the greatest mass? Protons, neutrons, electrons Neutrons, protons, electrons Electrons, neutrons, protons None of the above.

4. Yes No A lithium atom has 3 protons, 4 neutrons, and 3 electrons.

5. Yes No A lithium atom has 3 protons, 4 neutrons, and 3 electrons.

6. Which of the following charts is correct? Subatomic ParticleChargeLocation in Atom ProtonNegativenucleus Neutronpositivenucleus ElectronNo chargeElectron cloud Subatomic ParticleChargeLocation in Atom Protonpositivenucleus Neutronnegativenucleus ElectronNo chargeElectron cloud Subatomic ParticleChargeLocation in Atom Protonpositivenucleus NeutronNo chargenucleus ElectronnegativeElectron cloud

7. Which of the following charts is correct? Subatomic ParticleChargeLocation in Atom ProtonNegativenucleus Neutronpositivenucleus ElectronNo chargeElectron cloud Subatomic ParticleChargeLocation in Atom Protonpositivenucleus Neutronnegativenucleus ElectronNo chargeElectron cloud Subatomic ParticleChargeLocation in Atom Protonpositivenucleus NeutronNo chargenucleus ElectronnegativeElectron cloud

8. What’s the best way to identify an atom? Count the number of valence electrons it has. Count the number of protons it has. Count the number of neutrons it has. Count the number of electrons it has.

9. What’s the best way to identify an atom? Count the number of valence electrons it has. Count the number of protons it has. Count the number of neutrons it has. Count the number of electrons it has.

10. Yes No Valence electrons determine an atom’s chemical properties like reactivity.

11. Yes No Valence electrons determine an atom’s chemical properties like reactivity.

12. Using your periodic table…is Lithium more similar to Sodium or Beryllium? Beryllium Sodium Both None of the above

13. Using your periodic table…is Lithium more similar to Sodium or Beryllium? Beryllium Sodium Both None of the above

14. Yes No Group 1 is highly reactive because the atoms in group 1 only have 1 valence electron.

15. Yes No Group 1 is highly reactive because the atoms in group 1 only have 1 valence electron.

16. Yes No Group 18, the Noble Gas Family, is highly reactive because it has many valence electrons.

17. Yes No Group 18, the Noble Gas Family, is highly reactive because it has many valence electrons.

18. Yes No Periods are rows on the Periodic Table. They describe the number of energy levels the atom has.

19. Yes No Periods are rows on the Periodic Table. They describe the number of energy levels the atom has.

20. Which of the following is an organic compound? NO 2 C 6 H 12 O 6 H2OH2O All of the above.

21. Which of the following is an organic compound? NO 2 C 6 H 12 O 6 H2OH2O All of the above.

22. Which of the following statements is true. Aluminum is a noble gas. Aluminum is not malleable, poor conductor and has a low luster. Aluminum is a metalloid. Aluminum is highly malleable, a good conductor of electricity, and has a high luster.

23. Which of the following statements is true. Aluminum is a noble gas. Aluminum is not malleable, poor conductor and has a low luster. Aluminum is a metalloid. Aluminum is highly malleable, a good conductor of electricity, and has a high luster.

24. Which of the following is a compound? Co CO 2 Fe Cl

25. Which of the following is a compound? Co CO 2 Fe Cl

26. Which of the following is the density for an object that is 30g and has a volume of 3 cm 3 ?.10 g/cm 3 90 g/cm 3 27 g/cm 3 10 g/cm 3

27. Which of the following is the density for an object that is 30g and has a volume of 3 cm 3 ?.10 g/cm 3 90 g/cm 3 27 g/cm 3 10 g/cm 3

28. Yes No Enzymes and HCl acid breaking down food is an example of a physical change in the digestive system.

29. Yes No Enzymes and HCl acid breaking down food is an example of a physical change in the digestive system.

30. How many total atoms are in the formula CH 4 ? 2 4 3 5

31. 2 4 3 5

32. How many atoms of Iron are there in 2Fe 2 O 3 ? 5 3 2 4

33. 5 3 2 4

34. How many atoms of potassium are there in KCl 2 ? 1 2 3 0

35. 1 2 3 0

36. Why are atoms placed into groups on the periodic table? Because they have similar physical properties. Because they have similar chemical properties like reactivity. Because they are either a metal, non metal, or metalloid. Because they all have the same number of protons.

37. Why are atoms placed into groups on the periodic table? Because they have similar physical properties. Because they have similar chemical properties like reactivity. Because they are either a metal, non metal, or metalloid. Because they all have the same number of protons.

38. Yes No The atoms in group 7A or 17 have 7 valence electrons, whereas the atoms in group 3A or 13 have 3 valence electrons.

39. Yes No The atoms in group 7A or 17 have 7 valence electrons, whereas the atoms in group 3A or 13 have 3 valence electrons.

40. Yes No Sugar and water were mixed together to form sugar water. This is an example of a chemical reaction.

41. Yes No Sugar and water were mixed together to form sugar water. This is an example of a chemical reaction.

42. Yes No A precipitate formed from combining lead nitrate and potassium iodide in a test tube. The precipitate is evidence that a chemical reaction occurred.

43. Yes No A precipitate formed from combining lead nitrate and potassium iodide in a test tube. The precipitate is evidence that a chemical reaction occurred.

44. Which of the following statements describes a chemical reaction? The atoms of the reactants make new atoms called products which is a new substance. Atoms disappear and new ones appear to form the new substance. The atoms of the reactants get rearranged into products forming a new substance. A new substance forms that is the same as the original substances.

45. Which of the following statements describes a chemical reaction? The atoms of the reactants make new atoms called products which is a new substance. Atoms disappear and new ones appear to form the new substance. The atoms of the reactants get rearranged into products forming a new substance. A new substance forms that is the same as the original substances.

46. When ammonia and grape juice react, a color change occurs. What does this color change indicate? The two colors mixed together A physical change occurred. A new substance formed None of the above.

47. When ammonia and grape juice react, a color change occurs. What does this color change indicate? The two colors mixed together A physical change occurred. A new substance formed None of the above.

48. Vinegar and baking soda were combined in an air tight zip-lock baggie. Why does the baggie expand? A physical change occurred. A precipitate formed. A gas was produced. All of the above.

49. Vinegar and baking soda were combined in an air tight zip-lock baggie. Why does the baggie expand? A physical change occurred. A precipitate formed. A gas was produced. All of the above.

50. Yes No The following chemical equation is balanced: Hg0  HgO 2

51. Yes No The following chemical equation is balanced: Hg0  HgO 2

52. Yes No The following equation is balanced: 2H 2 O 2  2H 2 O + O 2

53. Yes No The following equation is balanced: 2H 2 O 2  2H 2 O + O 2

54. Yes No The law of conservation of mass states that in a chemical reaction matter is not lost or gained.

55. Yes No The law of conservation of mass states that in a chemical reaction matter is not lost or gained.

56. CHO is an example of ---------- An inorganic compound An element An organic compound All of the above

57. CHO is an example of ---------- An inorganic compound An element An organic compound All of the above

58. A hypothesis is ---- A prediction based on prior knowledge A guess An estimate None of the above.

59. A hypothesis is ---- A prediction based on prior knowledge A guess An estimate None of the above.

60. Chlorine is similar to __________ because they react the same way. Argon Sulfur Fluorine Sodium

61. Chlorine is similar to __________ because they react the same way. Argon Sulfur Fluorine Sodium