Lewis Structures/Electron Dot Diagrams

1. What is the formula for the Lewis Structure above?
2. What elements are represented?
3. How many of each?
4. How many electrons are drawn?
5. What type of bond does this molecule have?

Left Side:

For my lesson on drawing Lewis Structures, I made a booklet to follow along with my PowerPoint and classwork. On the first page of the booklet, I have fill in the blank notes and inside the booklet, I have elements #1-20 for the students to complete either independently or with a partner.

For this lesson, I model the first problem and we do the Lewis Structure for Carbon, going over the steps one at a time and explaining the process.

I then have them try Hydrogen on their own. We then go over the answer together. Depending on how comfortable they are, I have them do one more and then we go over the answer together. Then I give the students time (maybe 5-10 minutes tops) to work on the rest of the problems while I walk around and monitor/answer questions.

Once everyone is done with the practice problems, we go over the answers using the rest of the power point. The students can then work independently or with a partner to complete the rest of the elements inside the booklet.

SmartBoard: If you have a SmartBoard, you can pull up the pdf file and enlarge the view, that way students can come up to the board and draw in the electrons for the elements when you are going over the answers. The rest of the students can then self correct their work.

Just added: Another option is to slightly modify this SmartBoard file. Have the students drag the electrons into position around the corresponding element symbol.

Right Side:

I made a homework sheet for the students to practice finding the elements on the periodic table, writing/reading the element symbols, finding the group number, determining the number of valence electrons, and drawing the Lewis Structure.

Handouts:

• Notes: Front and Back of Booklet
• Classwork: Inside of the Booklet (Photocopy these two docs front/back then fold)
• Lewis Structures homework/practice
• PowerPoint for lesson

Answers: how did you do?

1. CCl4
2. C = Carbon, Cl = Chlorine
3. C = 1, Cl = 4
4. 32 electrons
5. Covalent, both are non-metals