1. REVIEW
Chemistry of Life
&
Properties of Water

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

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

4. Isotope
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

5. What is a pure substance composed
of two or more elements?
COMPOUND
C6H12O6

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

7. Element or compound? C Ca Na N2 O2 K

8. ELEMENT or COMPOUND Br H2 N
CO2
BaCO3
CaCl2

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

10. ELEMENT or COMPOUND

11. ELEMENT or COMPOUND

12. ?
Chemical bond

13. Hydrogen
bonds ?

14. Polar or
Nonpolar
Polar

15. Polar or
Nonpolar

16. Polar or
Nonpolar

17. Chemical bond where electrons
are transferred?
Ionic bond

18. Chemical bond where electrons
are shared?
Covalent bond

19. H2O O H H
Water is polar!

20. 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
Water has a high specific heat.

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

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

23. What happening on the surface?
cohesion

24. What happening here? ?
adhesion

25. ?

26. Hydrogen bonding
Cohesion and adhesion occur because of

27. ?
solute ?
solvent

28. Rule: Like dissolve like
polar solvents dissolve polar solutes
nonpolar solvents dissolve nonpolar solutes.

29. ? ? ?

30. Why is the paper clip floating?
Surface tension

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

32. ?
cohesion
adhesion ?

33. 96% of the mass of a human is made of only 4 elements – carbon,
96% of the mass of a human is made of only 4 elements – carbon, hydrogen, oxygen, nitrogen.

34. 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

35. 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

36. 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

37. 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

38. Acid
Base

39. Not complete
Examples of ph

40. Everyone A’s and B’s
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Study!!!!!