1. Chemical Reactions …fun for all…

2. Synthesis A + B AB Magnesium + Chlorine Mg 2+ + Cl 1- The ionic charge of Mg is 2+ because it must give away two electrons to reach a stable electron configuration Chlorine is 1- because it gains one electron

3. Synthesis A + B AB Mg 2+ + Cl 1- MgCl 2 but the chemical reaction is not balanced (i.e., number of products does not equal number of reactants) so Mg + 2Cl MgCl 2

4. Synthesis A + B AB Try another …practice is good Aluminum reacts with fluorine Al + F

5. Al 3+ + F 1- Al + F AlF 3 Al + 3F AlF 3 Compound name is Aluminum fluoride

6. Synthesis A + B AB Another one…yippee Calcium mixes with oxygen Ca + O 2

7. Ca 2+ + O 2 2- Ca + O 2 CaO Ca + O 2 2CaO 2Ca + O 2 2CaO 2 Compound name is Calcium oxide

8. Synthesis A + B AB MORE… Potassium reacts with sulfur K + S

9. K 1+ + S 2- K 1+ + S 2- K 2 S 2K + S K 2 S Compound name is Potassium sulfide

10. Synthesis A + B AB Again we do this… Copper II reacts with fluorine Cu + F

11. Cu 2+ + F 1- Cu 2+ + F 1- CuF 2 Cu + 2F CuF 2 Compound name is Copper II fluoride

12. Synthesis A + B AB Yet, again… Lead IV reacts with oxygen Pb + O

13. Pb 4+ + O 2- Pb 4+ + O 2- PbO 2 Pb + 2O PbO 2 Compound name is Lead IV oxide

14. Synthesis A + B AB Lastly… Iron III reacts with oxygen Fe + O

15. Fe 3+ + O 2- Fe 3+ + O 2- Fe 2 O 3 2Fe + 3O Fe 2 O 3 Compound name is Iron III oxide

16. For good online practice…. Go to MacGraw-Hill Science http://glencoe.mcgraw- hill.com/sites/0078600510/student_view0/ unit5/chapter20/math_practice.html