1. Today we will… Discuss yesterday’s lab Learn about polyatomic ions Learn about metallic bonds

2. Daily Quiz

3. Name the following ionic compounds.

4. Daily Quiz 1.CaS

5. Daily Quiz 2.MgCl 2

6. Daily Quiz 3.LiOH

7. Daily Quiz 4.K 2 SO 4.

8. Daily Quiz 1.CaS

9. Daily Quiz 1.CaS calcium sulfide

10. Daily Quiz 2.MgCl 2

11. Daily Quiz 2.MgCl 2 magnesium chloride

12. Daily Quiz 3.LiOH

13. Daily Quiz 3.LiOH lithium hydroxide

14. Daily Quiz 4.K 2 SO 4

15. Daily Quiz 4.K 2 SO 4 potassium sulfate.

16. Making Ionic Compounds

17. MaterialMass (g) Empty crucible Crucible and Mg before heating Magnesium ribbon Crucible and Mg products after heating Magnesium products

18. Making Ionic Compounds 2.Classifying What kind of energy was released by the reaction?

19. Making Ionic Compounds 3. Using Numbers How do you know that the magnesium metal reacts with certain components of the air?

20. Making Ionic Compounds 4.Predicting Mg reacts with both O and N from the air. Predict the binary formulas of both products. Write the names of these two compounds.

21. Making Ionic Compounds 5. Analyzing and concluding The product formed from Mg and O is white, and the product formed from Mg and N is yellow. From your observations, which compound makes up most of the product?

22. Making Ionic Compounds 6. Analyzing and concluding Did the Mg compounds and water conduct electric current? Do the results indicate whether or not the compounds are ionic?

23. Making Ionic Compounds 7. Error Analysis If the magnesium lost mass instead of gaining mass, what do you think was a possible source for the error?

24. Tonight’s Homework: Problem 39 on page 227 Questions 40, 42, and 44 on page 231.

25. Polyatomic Ions Most ionic compounds are binary…

26. Polyatomic Ions Most ionic compounds are binary… …but sometimes a whole group of atoms will carry a charge together

27. Polyatomic Ions Most ionic compounds are binary… …but sometimes a whole group of atoms will carry a charge together. A polyatomic ion is an ion made up of more than one atom.

28. Polyatomic Ions Example:

29. Polyatomic Ions Example: NO 3 - nitrate

30. Polyatomic Ions A polyatomic ion acts just like a monatomic ion. K + NO 3 - potassium nitrate

31. Polyatomic Ions A polyatomic ion acts just like a monatomic ion. KNO 3 potassium nitrate

32. Polyatomic Ions A polyatomic ion acts just like a monatomic ion. Ca +2 NO 3 - calcium nitrate

33. Polyatomic Ions Because a polyatomic ion is a unit, you never change the subscripts within the ion. Ca +2 NO 3 - calcium nitrate

34. Polyatomic Ions Because a polyatomic ion is a unit, you never change the subscripts within the ion. Ca +2 (NO 3 ) - calcium nitrate

35. Polyatomic Ions Because a polyatomic ion is a unit, you never change the subscripts within the ion. Ca(NO 3 ) 2 calcium nitrate

36. Metallic Bonds When atoms of metals get together, the atoms don’t give away electrons

37. Metallic Bonds When atoms of metals get together, the atoms don’t give away electrons. Instead, the outer electron shells overlap so the electrons can easily float from atom to atom

38. Metallic Bonds When atoms of metals get together, the atoms don’t give away electrons. Instead, the outer electron shells overlap so the electrons can easily float from atom to atom. These delocalized electrons form an electron sea.

39. Metallic Bonds

48. Homework: 19-23 on pg 224 24-28 on pg 225 40, 42, 44 on pg 231