1. Unit 3 Review

2. Objective #31
Describe covalent and ionic bonds

3. Objective #31
What happens to the valence electrons of sodium and chlorine when they bond? What happens to the valence electrons of carbon and hydrogen when they bond?

4. Objective #32
Predict what type of bond would form between 2 atoms using the Periodic Table.

5. Objective #32
What kind of bond is formed between magnesium and oxygen? What kind of bond is formed between nitrogen and another nitrogen?

6. Objective #33
Predict what the formula of an ionic compound would be given the combining cation and anion.

7. Objective #33
What is the formula of the compound when the following ions combine? Fe3+ and SCN- Ca2+ and OH- NH4+ and PO43-

8. Objective #34
Predict what type of bond would form between 2 atoms using the differences in electronegativity.

9. Objective #34
Give an example of 2 atoms with each of the following bonds using the charts provided:
2 atoms with a nonpolar covalent bond
2 atoms with a polar covalent bond
2 atoms with an ionic bond

10. Objective #35
Understand electrostatic attraction

11. Objective #35
Describe how sodium and chlorine are attracted to one another when they bond.

12. Objective #36
Relate the number of “dots” in a Lewis dot structure to the number of valence electrons.

13. Objective #36
Prove that argon has 8 valence electrons.

14. Objective #37
Follow the rules of drawing Lewis or electron dot diagrams.

15. Objective #37
Draw any Lewis structure using 4 total atoms that shows 3 (and only 3) covalent bonds.

16. Objective #38
State the octet rule.

17. Objective #38
Why does hydrogen not follow the octet rule? Name 4 atoms that “want to be like argon” and describe how they achieve this.

18. Objective #39
Describe the polarity of water.

19. Objective #39
Why is the word ‘polar’ used to describe molecules like water?

20. Objective #40
Describe hydrogen bonding.

21. Objective #40
You have to put on a pair of socks. You probably know that it’s easier to do if your feet are totally dry. Why is this true? I bet hydrogen bonding has something to do with it.

22. Objective #41
Compare and contrast polar and nonpolar covalent bonds.

23. Objective #41
Water is a polar compound. Oil is a nonpolar compound. How come water can’t dissolve oil? Being polar and nonpolar are used in the explanation!