Monday November 8th. Covalent Bonds.

   Today as we walked into class we were greeted by 8 new sheets to add to our notebooks. They are about Covalent Bonding. If you weren't here (or just forget) last Friday we were in the Math Lab doing the covalent bonding Chemthink. We also have 2 Webassigns due November 24th on Covalent Bonding (Chapeter 5). 

  During class we completed pages 2-5 of our new sheets. Page 1 is optional extra credit for which you have to go back to the Chemthink and get your answers from that. If you were absent the answers for pages 2-5 are as follows:

Pg. 2:

1. a) decrease, increase, P-e-1 attraction. Attraction=bonding=stability

    b) increases, decreases, P-P repulsion. Repulsion=longer bond=less stable

Pg. 3:

2. inversely, increase, decrease

3. a) increases as it goes down the periodic table and decreases as it goes across. 

    b) increases as it goes down because as you add more shielding electrons there is a weaker pull from the nucleus.

Pg. 4: 

-write the 1st element

   *add the appropriate prefix with the exception of mono

-write the name of the second element 

   *drop ending and add -ide

   *add appropriate prefix

dinitrogen pentoxide: N2O5

carbon tetrachloride: CCl4

nitrogen dioxide: NO2

sulfur dioxide: SO2

phosphorus pentaflouride: PF5

nitrogen monoxide: NO

sulfur trioxide: SO3

nitrogen triflouride: NF3

boron trisulfide: BS3

carbon dioxide: CO2

nirtogen triiodide: NI3

carbon tetrabromide: CBr4

Pg. 5:

1. NaO3.....I......sodium nitrate

2. Al2O3.....I......aluminum oxide

3. PCl5.....C......phosphorus pentachloride

4. IF3....C.....iodine triflouride

5. LiOH.....I....lithium hydroxide

6. Ba(NO3)2.....I.....barium nitrate

7. SrBr2......I.......strontium bromide

8. Cu2S......I....copper (I) sulfide

9. N2O5.......C.......dinitrogen pentoxide

10. Fe3N2.....I......iron (II) nitride

11. CO......C......carbon monoxide

We also went over the Ionic Bonding Quest in class today. Remember to take it if you haven't already and if you have questions see Mrs. M. 

Again, Homework:

Webassigns (November 24th)

Page 6 (November 9th/tomorrow)

Page 1 (Extra Credit) (November 9th/tomorrow)