1. Catalyst – October 9(3), 2009
Write and name the compound formed through Beryllium and Oxygen.
Write and name the compound formed between Potassium and Sulfur.
I hyperlinked the picture of the stopwatch to

2. Today’s Agenda Catalyst Practice Naming Ionic
Intro to Covalent Compounds
Covalent Bond Formation (more LDS’s!)
Project Work Time
Exit Question

3. What do you see? Copy the table into your notes and fill in the question marks with what you think is correct.
Formula for
Ionic Compound
Name for
NaCl
Sodium chloride
CaCl2
Calcium chloride
KBr
Potassium bromide
MgF2
???
NaBr

4. Naming Ionic Compounds
Write name of first element (metal).
Second element ends in -ide.
Ignore subscripts!

5. Naming Ionic Compounds
Draw a mental line between the ions.
Na+ Cl-

6. Naming Ionic Compounds
Binary Ionic Compound – an ionic compound composed of two elements

7. Naming Ionic Compounds
ZnO

8. Naming Ionic Compounds
ZnO
Zinc Oxide

9. Naming Ionic Compounds
CaCl2

10. Naming Ionic Compounds
CaCl2
Calcium Chloride

11. Naming Ionic Compounds
Al2O3

12. Naming Ionic Compounds
Al2O3
Aluminum Oxide

13. Naming Ionic Compounds
Ternary Ionic Compound – an ionic compound with more than 2 elements

14. Naming Ionic Compounds
Ionic Cheat Sheets!

15. Naming Ionic Compounds
Do not lose this…you will need it the rest of your life (in my class).

16. Naming Ionic Compounds
The way you use it…

17. Naming Ionic Compounds
1) Look up the ions on the cheat sheet and write the words next to them.

18. Naming Ionic Compounds
BaCO3

19. Naming Ionic Compounds
BaCO3
Normally the first element is the first piece and the rest is the second piece.

20. Naming Ionic Compounds
BaCO3
Barium

21. Naming Ionic Compounds
If the first element is +2, where should we find the second?
(Remember, charges must balance!)

22. Naming Ionic Compounds
BaCO3
Barium

23. Naming Ionic Compounds
BaCO3
Barium Carbonate

24. Naming Ionic Compounds
AlPO3

25. Naming Ionic Compounds
AlPO3
Aluminum

26. Naming Ionic Compounds
AlPO3
Aluminum Phosphite

27. Naming Ionic Compounds
H3PO4

28. Naming Ionic Compounds
H3PO4
Hydrogen

29. Naming Ionic Compounds
H3PO4
Think: H+, we have 3 which means +3, where will PO4 be?

30. Naming Ionic Compounds
H3PO4
Hydrogen Phosphate

31. Naming Ionic Compounds
FeSO4

32. Naming Ionic Compounds
FeSO4
Notice Iron appears in +2 and +3…

33. Naming Ionic Compounds
FeSO4
Sulfate

34. Naming Ionic Compounds
FeSO4
Since Sulfate is -2, Fe must be +2

35. Naming Ionic Compounds
FeSO4
Iron(II) Sulfate

36. Naming Ionic Compounds
FeSO4
Iron(II) Sulfate or
Ferrous Sulfate

37. Today’s Objectives SWBAT find some atom love!
SWBAT state characteristics of covalent compounds.
SWBAT model covalent bond formation.

38. Covalent Compounds in da House!
Covalent compounds are EVERYWHERE!
Household cleaners (Ammonia)
Water!
Salad dressing
Political debate! (think greenhouse gases)

39. Find the Characteristics of Covalent Compounds….
Let’s HUNT!

40. Characteristics of Covalent Compounds (Key Point #1)
Electrons are shared
Bonds between nonmetals
Usually gases at room temperature (not crystals )
Low melting points
Poor conductors of electricity

41. What’s the difference between ionic and covalent compounds?
It is important to understand the differences between ionic and covalent compounds
Let’s review ionic compound characteristics…

42. Characteristics of Ionic Compounds
Electrons are transferred
Bonds between metals and nonmetals
Make crystals
High melting points
Good conductors of electricity when dissolved

43. Group Race!
Each group will complete a Double Bubble Diagram…liiiiiike this (Double Bubble doc)
Rules:
No talking or sharing of notes!
First person fills in ONE bubble and passes paper to next person – cannot skip people!
If next person doesn’t know an answer, he/she must stand up and do 10 jumping jacks before passing paper.
Next person fills in ONE bubble and passes paper to next person…etc!

44. How do covalent bonds form?
Let’s look at Lewis Dot Structures again!
Key Point #2: Each atom in a compound satisfies the octet rule. This is shown in a Lewis Dot Structure.

45. Single Bonds
Single covalent bond: one pair of shared electrons (two electrons)
Atoms may be the same
H2, F2, Cl2, Br2, I2, O2
Atoms may be different
HF, HCl, HBr, HI =

46. Formation of Single Covalent Bonds
Examples H2 F2
HCl (chlorine)

47. Formation of Single Covalent Bonds
Your Turn!
Cl2
HBr

48. Hydrogen will NEVER be a central atom!
Tricks!
Central atom: in the center of a molecule, usually has lower electronegativity
Terminal atom: not in the center of a molecule
Hydrogen will NEVER be a central atom!

49. Formation of Multiple Single Bonds
Examples
NH3
SeCl2

50. Formation of Multiple Single Bonds
Your Turn!
NF3
CH4
CH3Cl

51. Practice Time – Finish for HW!
Draw the Lewis Dot Structures for the following covalent compounds:
Br2 HI
PH3
H2S
CCl4
SiH4

52. Exit Question What are 3 characteristics of covalent compounds?
What is one difference between ionic and covalent compounds?
Draw the Lewis Dot Structure for Cl2.