1. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 2 Basic Chemistry and Cells

2. All Matter Is Composed of Chemical Elements 2-

4. Figure 2.1 Elements that make up the Earth’s crust and its organisms 2-

7. 2-

8. Figure 2.2A The stippled area shows the probable location of electrons 2-

9. Figure 2.2B The shells in this atomic model represent the average location of electrons 2-

10. Figure 2.2C Atomic model of a carbon atom 2-

13. Atoms React with One Another to Form Molecules 2-

15. Figure 2.4A A portion of the periodic table of the elements 2-

16. Figure 2.4B Models of the six elements that are predominant in living things 2-

19. Figure 2.5 Formation of sodium chloride (table salt) 2-

21. Figure 2.6A Electron models and formulas representing covalently bonded molecules 2-

22. Figure 2.6B Other types of molecular molecules—in this case, for methane (CH 4 ) 2-

25. Figure 2.7 Three models of water 2-

27. Figure 2.8 Hydrogen bonding between water molecules 2-

28. The Properties of Water Benefit Life 2-

30. Figure 2.9 Water as a transport medium in trees 2-

33. Figure 2.11 An ionic salt dissolves in water 2-

35. Figure 2.12A Ice is less dense than liquid water 2-

36. 2- Living Things Require a Narrow pH Range

38. Figure 2.13A Dissociation of water molecules 2-

41. Figure 2.14 The pH scale 2-