1. REVIEW Chemistry of Life & Properties of Water

2. Atomic number =# of protons = # of electrons

3. What is this? An atom Of which element? Lithium

4. What is a pure substance composed of two or more elements? C 6 H 12 O 6 COMPOUND

5. What is a pure substance composed of one type of atom? ELEMENT

6. Element or compound? C Ca K O2O2 Na N2N2

7. ELEMENT or COMPOUND Br CaCl 2 BaCO 3 H2H2 N CO 2

8. How many electrons? How many protons? 8 8

9. ELEMENT or COMPOUND

11. ? Chemical bond

12. ? Hydrogen bonds

13. Polar or Nonpolar Polar

14. or Nonpolar

15. Polar or Nonpolar

16. Chemical bond where electrons are transferred? Ionic bond

17. Chemical bond where electrons are shared? Covalent bond

18. H2OH2O O H H Water is polar!

19. Water has a high specific heat. During the hot summer, the pond’s temperature remains at a warm 82° F. This is an example of

20. Water forms beads on the surface of this leaf. This is an example of cohesion

21. Water sticks to the grass. This is an example of adhesion

22. ? cohesion What happening on the surface?

23. ? adhesion What happening here?

24. ?

25. Cohesion and adhesion occur because of Hydrogen bonding

26. solvent solute ? ?

27. ? ? ?

28. Why is the paper clip floating? Surface tension

29. Why does water form a sphere in the space station? Cohesion

30. ? cohesion ? adhesion

31. Water is a common cleaning agent. It is most effective for dissolving substances with which characteristic? a) polar bonds b) high density c) high specific heat d) covalent bonding

32. What accounts for many of the unique properties of water that make it essential for life? a) covalent bonding between water molecules b) covalent bonding between oxygen and hydrogen c) high specific heat d) hydrogen bonding between water molecules

33. What property of water allows ice to float? a) ice is less dense than liquid water b) ice is more dense than liquid water c) ice has a high specific heat d) water has a high specific heat

34. Which property causes the cohesion and adhesion of water molecules that moves water through a plant against the force of gravity? a) density b) volume c) polarity d) heat capacity

35. Acid Base

36. Not complete Examples of ph

37. Study!!!!! Everyone A’s and B’s We can do this!!!!