LT 4: I can describe the properties of atoms.

1. What is an atom?

2. What is an isotope and how is it different from an atom?

3. What is an ion and how is it different from an atom?

4. What is a compound?

Subatomic Particle / Charge / Do they have mass? / Where in the atom are they found?
Proton
No
Neutral

5. What is atomic number?

6. What is atomic mass?

Element / # Protons / # Neutrons / # Electrons / Atomic Number / Atomic Mass
Carbon / 12
15 / 16
8 / 16
19 / 20
Sulfur / 17

LT 5: I can describe the types of chemical bonding.

5. Which subatomic particle is involved in bonding?

6. What is an ionic bond?

7. When do ionic bonds occur (electronegativity)?

8. What is a covalent bond?

9. When do covalent bonds occur (using electronegativity)?

10. What is a polar covalent bond?

11. What is a nonpolar covalent bond?

12. How do intermolecular bonds compare with ionic and covalent bonds?

14. How do van der Waals forces work?

15. How do Geckos use van der Waals forces?

LT 6: I can explain the unique properties of water.

16. Draw a diagram of a water molecule showing the atoms and where the charges are.

17. What does it mean when we say that water is a polar molecule?

18. What is hydrogen bonding? How does it work?

19. What is cohesion? Give an example.

20. What is adhesion? Give an example.

21. What happens to water when it freezes that is unusual?

LT 7: I can explain the properties of solutions and suspensions.

22. What is a mixture?

23. What is a solution?

24. What is a suspension?

25. What is a solvent?

26. What is a solute?

27. How can you tell the difference between solutions and suspensions?

28. What property of water allows it to dissolve many substances? (hint: it’s not hydrogen bonds.)

LT 8: I can explain how the pH scale works.

29. Write the equation that shows how water can split apart into hydrogen and hydroxide ions.

30. How frequently does this happen in pure water?

31. What is an Acid?

32. What is a base?

33. How does the pH scale represent the number of hydrogen and hydroxide ions in solution?

34. What happens to the number of hydrogen ions in solution as the pH goes down? Goes up?

35. What happens to the number of hydroxide ions in solution and the pH goes down? Goes up?

36. Give some examples of weak acids. Give examples of strong acids.

37. Give some examples of weak bases. Give examples of strong bases.

38. What is the pH of a completely neutral substance? What is an example of a neutral substance?

39. What is a buffer? What do buffers do that help living cells survive changes in pH?

40. Draw a diagram of the pH scale. Label bases, acids and neutral.