1. CHAPTER 2 TRASH BALL REVIEW
Adrian Daniels

2. Chemistry deals with a. Composition of substances
b. Changes that occur in substances
c. Substances that make up organisms
d. All of the choices are correct

3. D

4. Which of the following substances is an element?
a. Iron
b. Carbon
c. Oxygen
d. All of the choices are correct

5. D

6. Which of the following substances comprise over 95 percent of the human body
a. Carbon, hydrogen, oxygen, nitrogen
b. Calcium, hydrogen, oxygen, nitrogen
c. Carbon, phosphorus, oxygen, hydrogen
d. Calcium, phosphorus, hydrogen, nitrogen

7. A

8. The first electron shell of an atom can hold a maximum of
a. 1 electron
b. 2 electrons
c. 4 electrons
d. 8 electrons

9. B

10. The formula H2O means
a. An atom contains 2 hydrogen molecules and 1 oxygen molecule
b. An atom contains 1 hydrogen molecule and 2 oxygen molecules
c. A molecule contains 2 hydrogen atoms and 1 oxygen atom
d. A molecule contains 1 hydrogen atom and 2 oxygen atoms

11. C

12. A decomposition reaction can be symbolized as
a. A + B > C + D b. A + B > AB c. AB > A+B d. C + D> AB

13. C

14. As a group, compounds that release ions when they dissolve in water are called
a. Acids
b. Bases
c. Salts
d. Electrolytes

15. D

16. A chemical reaction in which pairs of two different molecules trade positions with one another is a(n)
a. Decomposition reaction b. Exchange reaction c. Reversible reaction d. Synthesis reaction

17. B

18. The difference in hydrogen ion concentration between solutions with pH 4 and pH 5 is
a. Two fold
b. Five fold
c. Tenfold
d. Twentyfold

19. C

20. A person has alkalosis if the blood pH
a. Rises above 7.0
b. Drops below 7.0
c. Rises above 7.4
d. Drops below 7.4

21. C

22. Which of the following is the best source of saturated fat?
a. Corn oil b. Soybean oil c. Coconut oil d. None of the choices contain saturated fat

23. C

24. An atom is made of a. A nucleus d. electrons
b. Protons e. all of the above
c. Neutrons

25. D

26. Excess iron and iron deficiency lead to abnormal function.
a. True b. False

27. A

28. When atoms combine, they gain or lose
a. Electrons c. protons
b. Neutrons d. nuclei

29. A

30. Atoms that have the same atomic numbers but different atomic weights are
a. Catalysts c. isotopes b. Neutrons d. Heliotropes

31. C

32. An ion is
a. An atom that is electrically charged c. an atom that has lost an electron b. An atom that has gained an electron d. all of the above

33. A

34. In forming a covalent bond, electrons are
a. Shared by two atoms
b. Given up by an atom
c. Taken up by an atom
d. None of the above

35. A

36. An ionic bond is created by
a. A positive and negative ion attracting each other
b. Two or more positive ions combining
c. Two or more negative ions combining

37. A

38. True or False
The number of protons within an atom of an element is equal to its atomic weight

39. FALSE

40. True or False
Sodium and chloride atoms combine readily because they both tend to lose electrons.

41. TRUE

42. An atom that has gained or lost electrons is called an ion.
True or False
An atom that has gained or lost electrons is called an ion.

43. TRUE

44. Water is an example of a compound
True or False
Water is an example of a compound

45. TRUE

46. A substance that releases hydrogen ions in water is a base.
True or False
A substance that releases hydrogen ions in water is a base.

47. FALSE

48. True or False
Chemically stable atoms always have their outermost electron shell full.

49. TRUE

50. An electrolyte is defined as a substance that ionizes in water.
True or False
An electrolyte is defined as a substance that ionizes in water.

51. TRUE

52. True or False
A complex carbohydrate has a phosphate group attached to the sugar molecule.

53. FALSE

54. The branch of science that deals with composition of substances is ________________________

55. CHEMISTRY

56. The substances that comprise all matter are called _______________________________.

57. ELEMENT

58. The atomic number of an element is determined by the number of _________________________.

59. PROTONS

60. An element is inactive if ___________________________.

61. IF OUTER SHELLS ARE FULL TO THE MAX

62. The atomic weight of an element is determined by the number of _______________ ______________ ______________.

63. PROTONS AND NEUTRONS

64. Water is formed by molecules of hydrogen and oxygen united by a ________________ bond.

65. POLAR

66. A compound is formed when atoms of _________________ elements combine.

67. DIFFERENT

68. C6H12O6 is an example of a(n) _____________ formula.

69. MOLECULAR

70. Two major types of chemical reactions are called _________________ and _________________.

71. SYNTHESIS AND DECOMPOSITION

72. An electrolyte that releases hydrogen ions in water is a(n) _______________________.

73. ACID

74. Electrolyte that release ions that combine with hydrogen ions are called __________________.

75. BASES

76. Organic substances always contain the elements hydrogen and __________. 

77. CARBON

78. The midpoint of the pH scale is pH ____.

79. 7

80. The opposite of a decomposition reaction is called __________.

81. SYNTHESIS

82. Fats, phospholipids, and steroids are important ______________________ found in the human cell.

83. LIPIDS

84. An enzyme is a(n) _____________________ that acts as a catalyst.

85. PROTEIN

86. Substances that release hydrogen ions (H+) in water are called __________________

87. ACIDS

88. Substances that release ions that combine with hydrogen ions are _____________________

89. BASES

90. An inorganic substance that releases ions when it reacts with water is known as a(n) _____________

91. ELECTROLYTE

92. The pH measures concentrations of _____________ ______________.

93. HYDROGEN IONS

94. The parts of an atom that carry single negative electrical charges are called __________. 

95. Electrons

96. Matter is defined as anything that __________.

97. HAS WEIGHT AND TAKES UP SPACE