1. Take out DHMO letter please.
Catalyst – October 23+6, 2009
Take out DHMO letter please.
Model the formation of the following compound: H2S
Draw the Lewis Structure for P2
I hyperlinked the picture of the stopwatch to

2. Today’s Agenda Catalyst Review Multiple Bond Formation
DHMO Letter Sharing
Naming Covalent Compounds
Exit Question

3. Today’s Objectives
SWBAT model bond formation for single and multiple covalent bonds.
SWBAT name covalent compounds.

4. Steps for Multiple Bond LDS’s
Write formula
Number of valence electrons (ve-)
Number of octet electrons (oe-)
Number of bonds = [(oe-) – (ve-)]/2
Draw LDS!

5. Try these! Write in notes!
CS2
CH2Cl2
Ge2H4 OS
C2Br6
NOBr

6. The Environment…
In this class, I want you to learn the contents of basic chemistry…
However, I also want you to be able to understand the importance of chemistry in the environment.
There is a chemical, DHMO, that is especially ruining our environment in many ways… and something must be done.

7. I have some DHMO with me today.
Surprise….
I have some DHMO with me today.
Does anyone want to see it??

8. Naming Covalent
Compounds

9. Naming Ionic Compounds
A compound made from Lithium and Oxygen.
How do we know if it is ionic or covalent?
Metals and non-metals make ionic compounds.

10. Ionic Bond
Ion: Li
Ion: O
Li O

11. Ionic Bond
Ion: Li
Ion: O
Li1+ O2-

12. Ionic Bond
Ion: Li
Ion: O
Li1+ O2-

13. Ionic Bond
Ion: Li
Ion: O
Li2O

14. Ionic Bond
Bohr Model: Li
Bohr Model: O

15. Ionic Bond
Bohr Model: Li
Bohr Model: O

16. Ionic Bond
Bohr Model: Li
Bohr Model: O

17. Ionic Bond
Bohr Model: Li
Bohr Model: O

18. Ionic Bond
Bohr Model: Li
Bohr Model: O

19. Naming Ionic Compounds
MgO

20. Naming Ionic Compounds
MgO
Magnesium Oxide

21. Naming Ionic Compounds
CaCl2

22. Naming Ionic Compounds
CaCl2
Calcium Chloride

23. Naming Ionic Compounds
Al2O3

24. Naming Ionic Compounds
Al2O3
Aluminum Oxide

25. Naming covalent compounds
No Kriss Krossing!
I will provide you with the compound’s formula.
However, naming will be a tiny bit more difficult.
In your notes, do this first example with me.

26. Naming Covalent Compounds
PCl3

27. How do we know if this is a covalent compound?
Is it between a metal and a nonmetal?
NO!!! Then, it is not ionic.
Is it between a nonmetal and a nonmetal?
YES!!! Then, it is covalent!

28. Naming Covalent Compounds
Rule 1: If the first element has more than one atom, give it a prefix.

29. Naming Covalent Compounds
1 – mono- 2 – di-
3 – tri- 4 – tetra-
5 – penta- 6 – hexa-
7 – hepta- 8 – octa-
9 – nona- 10 – deca-

30. Naming Covalent Compounds
PCl3

31. Naming Covalent Compounds
PCl3
Phosphorous

32. Naming Covalent Compounds
Rule 2: The second element always gets a prefix, uses the root of the word and ends in
-ide.

33. Naming Covalent Compounds
PCl3
Phosphorous

34. Naming Covalent Compounds
PCl3
Phosphorous
Trichloride

35. Naming Covalent Compounds
Rule 3: The “o” or “a” at the end of the prefix is dropped if the element begins in a vowel.

36. Naming Covalent Compounds
N2O

37. Naming Covalent Compounds
Rule 1: If the first element has more than one atom, give it a prefix.

38. Naming Covalent Compounds
N2O
Dinitrogen

39. Naming Covalent Compounds
Rule 2: The second element always gets a prefix, uses the root of the word and ends in -ide.

40. Naming Covalent Compounds
N2O
Dinitrogen Monooxide

41. Naming Covalent Compounds
Rule 3: The “o” or “a” at the end of the prefix is dropped if the element begins in a vowel.

42. Naming Covalent Compounds
N2O
Dinitrogen Monooxide

43. Naming Covalent Compounds
N2O
Dinitrogen Monoxide

44. Practice Time!
EXAMPLES
CCl4
As2O

45. Whiteboards SO

46. Sulfur Monoxide

47. NO2

48. Nitrogen Dioxide

49. N2O

50. Dinitrogen Monoxide

51. P2O5

52. Diphosphorous Pentoxide

53. PCl5

54. Phosphorous
Pentachloride

55. NF3

56. Nitrogen
Trifluoride

57. Writing Formulas from Names
EXAMPLES
Carbon tetrachloride
Diarsenic trioxide
Sulfur dioxide
Nitrogen trifluoride
YOUR TURN TO “FORMULIZE”
Sulfur trioxide
Carbon monoxide
Carbon dioxide
Boron trifluoride
Tetraphosphorus hexasulfide
Xenon difluoride

58. Independent Practice Time
Lucky you!

59. Exit Question Silicon dioxide Dihydrogen monoxide CO2
Write the formula for:
Silicon dioxide
Dihydrogen monoxide
Write the name for the following compounds:
CO2
NH3