1. Reactions Periodic Table & Elements Physical Chemical Changes Compounds & Mixtures Physical Chemical properties 10 20 30 40 50 60 80

2. This law says that atoms cannot be created or destroyed in a reaction ?? 10 points

3. Law of conservation of MASS/MATTER 10 points

4. Atoms re-arrange to form new compounds during…? ?? 20 points

5. During a chemical reaction 20 points

6. The following is a chemical reaction: A) Dissolving sugar B) Rusting nail C) Glass melting D) Alcohol vaporizing 30 points

7. B) Nail Rusting 30 points

8. CH 4 + 2O 2  CO 2 + 2H 2 O This is a chemical reaction because: A)It is balanced B)A new substance is formed C)It creates a gas and a solid D)There are 2 substances on the reactant side 40 points

9. B) A new substance is formed 40 points

10. CH 4 + 2O 2  CO 2 + 2H 2 O Why do the O 2 and H 2 O have a “2” in front of them? 50 points

11. To BALANCE the reaction (same amount of atoms in and out) 50 points

12. CH 4 + 2O 2  CO 2 + 2H 2 O Which is a PRODUCT in this reaction? A)O 2 B)H C)CO 2 D)CH 4 60 points

13. C) CO 2 60 points

14. These elements are VERY reactive metals: –A) Alkaline Earth Metals –B) Noble gases –C) Transition Metals –D) Alkali Metals 10 points

15. –D) Alkali Metals 10 points

16. These elements are ductile, malleable, conduct heat and electricity, and are useful for building things 20 points

17. METALS 20 points

18. This metalloid is used in making glass and computer chips: 30 points

19. Silicon 30 points

20. This group of nonmetals includes gases that do not react easily with other elements: 40 points

21. Noble gases

22. Elements MOST closely related to each other are arranged in ______________ on the periodic table. 50 points

23. GROUPS

24. Most of the elements are: A) Natural nonmetals B) Natural metals C) Synthetic nonmetals D) Synthetic metals 60 points

25. B) Natural metals

26. This type of change causes NEW substances to be formed 10 points

27. Chemical changes 10 points

28. This type of change does not form new substances, and includes phase changes 20 points

29. Physical Changes 20 points

30. Which is PHYSICAL change? A)Iron rusting B)Hydrogen + oxygen  water C)Sulfur and oxygen forming Sulfur dioxide D) Liquid nitrogen becoming a gas at room temperature 30 points

31. Liquid nitrogen becoming a Gas at room temperature 30 points

32. When you stir salt into water, you form: A)A new substance B)A new compound C)A solution D)A new element 40 points

33. C) A solution 40 points

34. Which 2 materials form a new substance when combined? A)Water and Kool-Aid powder B)Baking soda and vinegar C)Iron nails and pennies D)Salt and pepper 50 points

35. B) Baking soda and vinegar 50 points

36. 60 points Which is a CHEMICAL change? A) spreading mustard B) mixing spices C) cutting a lawn D) making a cake

37. 60 points

38. Compounds are different from mixtures because: 10 points

39. COMPOUNDS: chemically attached MIXTURES: physically mixed, not chemically attached

40. H 2 SO 4 has ___ total atoms? 20 points

41. 7 atoms in H 2 SO 4 20 points

42. Which is/are a compound? A) Berkyllium B) Hyrogen C) Propane D) Water 30 points

43. C) Propane C 3 H 8 D) Water 30 points

44. HOW are compounds formed? 40 points

45. Atoms CHEMICALLY attach to each other 40 points

46. 50 points A substance is formed from 2 substances physically joined – this is a/an: A) element B) mixture C) compound D) atom

47. 50 points B) mixture

48. What is the chemical formula for GLUCOSE (a simple sugar)? 60 points

49. C 6 H 12 O 6 60 points

50. This property explains how tightly packed atoms are 10 points

51. DENSITY 10 points

52. Soda, sweet tea, and salt water are all what type of matter? 20 points

53. Homogeneous SOLUTIONS 20 points

54. Water and salt water have different melting and boiling points because...? 30 points

55. They are different substances. Every substance has its own M. & B. points 30 points

56. Water molecules begin to speed up, so that they can now move past each other. What phase transition is occurring? A) freezing B) melting C) evaporating D) condensing 40 points

57. B) melting 40 points

58. Which is/are insoluble in water? A) sugar B) sand C) oil D) drink mix 50 points

59. B) sand C) oil 50 points

60. Which is a NATURAL HOMOGENEOUS solution? A) salt B) soda C) steel D) blood 80 points

61. D) Blood 80 points