First Observation Class - Thurs Dec 10 Period 1

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Previous to this class
The student took a test on Objectives of Molecular Cpd and Mole Concept - Revised 2009. This section dealt with the 1st part of the whole discussion of how atoms come together to form compounds (cpd) and how chemist are able to count atoms (or groups of atom called cpd) even though can be so small that we can not weigh them individually (this concept is called the Mole Concept). The test assessed their knowledge of what I call One Step Mole problems and one of the two types of compounds called Molecular cpds. Atoms that make up Molecular cpds share their electrons.

Before I gave the test, I introduced what I call Two Step Mole problems. Basically, these problem are the same as One Step Problem except there are two One Step Problem in each Two Step Problem. We went over it before the test but it is a concept they will be tested on in this coming assessment. Usually I don't do this but I felt that if they could do Two Step Problems then it would make the One Step problems on the test trivial. I gave them 1/2 of a period to work on them and I was available to answer their questions. It is now due the period you will be observing.

The other thing that has been going on in the class before this period that you need to know about is that the students have been memorizing ions. Ions are charged atoms meaning the atom has lost or gained some electrons. They have memorized and been quizzed on Charge of Ions from Periodic Table and Cations with More than One Charge. They are working on memorizing their last portion of ions, Anion Table - Revised 2009-2010. All the memorizing has been done for now, the new section on ionic cpd.

Homework Due for This Observed Class

Quiz on 1st set of polyatomic ions (from Anion Table - Revised 2009-2010)
If not, complete Two Step Mole Problems Handout 1
If not already have, print out and read Naming Binary Ionic Compounds
Print out this section objectives, Objectives of Ionic Cpd and Two Step Mole

You can see the homework, click on 2009-2010 Period 1 and look at top of webpage.

Sub Essential Questions for Class

1) What is the key to understanding Ionic Cpds? - They are made up of ions (Key to naming and getting chemical formulas)
2) Can Two Step Mole Problems work same way as One Step Mole Problems?

In-class Activities

1)Quiz on 1st Set Polyatomic ion - part of Sub Essential Question 1
- Students will grade each other and then give To me to record grade (will hand back next class)
- 10 min max
2)Quickly go over next set of polyatomic ions to memorize
- 5 min max
3)Main activity for day (Naming Ionic Cpds) - Sub Essential Question 1
- Lecture on overheard (10 min)
  - They already have print out and read for HW, Naming Binary Ionic Compounds
  - Will go over handout
- Group Activity (Important: try to get across ionic cpd made up of ions and subscripts indicated ratio of ions)
  - Get students in groups, handout sheets of paper with ion pieces for two examples (can't put on computer will give in class)
  - Each group will do two examples of going from chemical name to chemical formula
  - Basically each group finds the ions on the sheet and puts them together. Due to how the pieces are shaped, the correct number of ions are attached to each other. Then they write down the chemical symbol for each ion, count up how many of each ion attach to each other and write that number as a subscript in the chemical formula.
- Depending on amount of time, will give out one portion of homework Binary Ionic Compound Homework Handout
4)Depending on amount of time, I may ask the students if anyone had problems with the Two Step Mole Problems (they already have answers)
- If yes, I will group them on one side of the class and help them while other side work on Naming Binary Ionic Cpd homework.
- This is 2nd sub essential question for the class. They will have more Two Step Mole Problems for homework.

Homework

Complete Binary Ionic Compound Homework Handout
Read Naming Ionic Compounds with Polyatomic Ions (same as binary except there are polyatomic ions)
Do Two Step Mole Problems Handout 2 (if time permits)

What will happen next

Will give answers Answers to Binary IC Homework Handout
Then will explain that naming ionic cpds with polyatomics is same as binary ionic cpds except for two changes for polyatomic ions
- Will handout blank pieces for students that want to create their own polyatomic ion pieces. Paper is a different color. Will eventually do the same for the final type of ionic cpd Naming Ionic Compounds with Cation with more than one charge. These will have their own color too.

FYI, there is actually only one way of naming ionic cpds but I break it up into 3 section because it seems the students understand it better that way. I re-enphasize this at the end of the section.