1. Chapter Opener 2

2. Figure 2.1 Two models of the structure of an atom.

3. Figure 2.1a Two models of the structure of an atom.

4. Figure 2.1b Two models of the structure of an atom.

5. Table 2.1 Common Elements Composing the Human Body (1 of 3)

6. Table 2.1 Common Elements Composing the Human Body (2 of 3)

7. Table 2.1 Common Elements Composing the Human Body (3 of 3)

8. Figure 2.2 Atomic structure of the three smallest atoms.

9. Figure 2.3 Isotopes of hydrogen.

10. Figure 2.4 The three basic types of mixtures.

11. Figure 2.5 Chemically inert and reactive elements.

12. Figure 2.5a Chemically inert and reactive elements.

13. Figure 2.5b Chemically inert and reactive elements.

14. Figure 2.6 Formation of an ionic bond.

15. Figure 2.6a Formation of an ionic bond.

16. Figure 2.6b Formation of an ionic bond.

17. Figure 2.6c Formation of an ionic bond.

18. Figure 2.7 Formation of covalent bonds.

19. Figure 2.7a Formation of covalent bonds.

20. Figure 2.7b Formation of covalent bonds.

21. Figure 2.7c Formation of covalent bonds.

22. Figure 2.8 Carbon dioxide and water molecules have different shapes, as illustrated by molecular models.

23. Figure 2.8a Carbon dioxide and water molecules have different shapes, as illustrated by molecular models.

24. Figure 2.8b Carbon dioxide and water molecules have different shapes, as illustrated by molecular models.

25. Figure 2.9 Ionic, polar covalent, and nonpolar covalent bonds compared along a continuum.

26. Figure 2.10 Hydrogen bonding between polar water molecules.

27. Figure 2.10a Hydrogen bonding between polar water molecules.

28. Figure 2.10b Hydrogen bonding between polar water molecules.

29. Figure 2.11 Patterns of chemical reactions.

30. Figure 2.11a Patterns of chemical reactions.

31. Figure 2.11b Patterns of chemical reactions.

32. Figure 2.11c Patterns of chemical reactions.

33. Figure 2.12 Dissociation of salt in water.

34. Figure 2.13 The pH scale and pH values of representative substances.

35. Figure 2.14 Dehydration synthesis and hydrolysis.

36. Figure 2.14a Dehydration synthesis and hydrolysis.

37. Figure 2.14b Dehydration synthesis and hydrolysis.

38. Figure 2.14c Dehydration synthesis and hydrolysis.

39. Figure 2.15 Carbohydrate molecules important to the body.

40. Figure 2.15a Carbohydrate molecules important to the body.

41. Figure 2.15b Carbohydrate molecules important to the body.

42. Figure 2.15c Carbohydrate molecules important to the body.

43. Figure Lipids.

44. Figure 2.16a Lipids.

45. Figure 2.16b Lipids.

46. Figure 2.16c Lipids.

47. Table 2.2 Representative Lipids Found in the Body (1 of 2)

48. Table 2.2 Representative Lipids Found in the Body (2 of 2)

49. Figure 2.17 Amino acid structures.

50. Figure 2.17a Amino acid structures.

51. Figure 2.17b Amino acid structures.

52. Figure 2.17c Amino acid structures.

53. Figure 2.17d Amino acid structures.

54. Figure 2.17e Amino acid structures.

55. Figure 2.18 Amino acids are linked together by peptide bonds.

56. Figure 2.19 Levels of protein structure.

57. Figure 2.19a Levels of protein structure.

58. Figure 2.19b Levels of protein structure.

59. Figure 2.19c Levels of protein structure.

60. Figure 2.19d Levels of protein structure.

61. Table 2.3 Representative Types of Proteins in the Body (1 of 2)

62. Table 2.3 Representative Types of Proteins in the Body (2 of 2)

63. Figure 2.20 Enzymes lower the activation energy required for a reaction.

64. Figure 2.21 Mechanism of enzyme action.

65. Figure 2.22 Structure of DNA.

66. Figure 2.22a Structure of DNA.

67. Figure 2.22b Structure of DNA.

68. Figure 2.22c Structure of DNA.

69. Table 2.4 Comparison of DNA and RNA

70. Figure 2.23 Structure of ATP (adenosine triphosphate).

71. Figure 2.24 Three examples of cellular work driven by energy from ATP.

72. Figure 2.24a Three examples of cellular work driven by energy from ATP.

73. Figure 2.24b Three examples of cellular work driven by energy from ATP.

74. Figure 2.24c Three examples of cellular work driven by energy from ATP.