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168 Unit 2 Smells Living By Chemistry Teaching and Classroom Resources Lesson16•Worksheet ©2012W.H.FreemanandCompany/BFW

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L E S S O N

16AcTIvITy

Polar Bears and PenguinsElectronegativity and Polarity

Name

Date Period

PurposeTo understand polarity and bonding between atoms.

InstructionsRead the comic strip “The Bare Essentials of Polarity,” and use it to answer these questions.

1. How does the comic strip define a polar molecule?

2. Define electronegativity as you understand it, after reading the first two pages of the comic strip.

3. What is the artist trying to represent by two polar bears arm wrestling or two penguins arm wrestling?

4. What three types of bonds are represented on the third page of the comic strip? What happens to the bonding electrons in each type of bond?

5. Explain why there are four scoops of ice cream in the illustration of O2 on the third page.

6. What do the six scoops of ice cream represent in the illustration of N2 on the fourth page?

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Living By Chemistry Teaching and Classroom Resources Unit 2 Smells 169 ©2012W.H.FreemanandCompany/BFW Lesson 16 •Worksheet

7. Describe what you think is happening to the penguin in the CO2 molecule in the picture on the fourth page.

8. Name three things that the picture of CO2 on the fourth page illustrates about the molecule.

9. Describe what you think is happening to the penguins in the illustration of H2O on the fourth page.

10. What does the crossed arrow represent in the comic strip?

11. What are two of the definitions of dipole given in the comic strip?

12. Making Sense What does electronegativity have to do with polarity?

13. If You Finish Early Using polar bears and penguins, create an illustration showing a hydrogen sulfide molecule, H2S. (Hint: You might want to start with a Lewis dot structure.)

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170 Unit 2 Smells Living By Chemistry Teaching and Classroom Resources Lesson16•Handout ©2012W.H.FreemanandCompany/BFW

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172 Unit 2 Smells Living By Chemistry Teaching and Classroom Resources Lesson16•Handout ©2012W.H.FreemanandCompany/BFW

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Living By Chemistry Teaching and Classroom Resources Unit 2 Smells 173 ©2012W.H.FreemanandCompany/BFW Lesson 16 •Handout

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174 Unit 2 Smells Living By Chemistry Teaching and Classroom Resources Lesson16•Transparency ©2012W.H.FreemanandCompany/BFW

ChemCatalystConsider this illustration:

1. If the penguin represents a hydrogen atom and the polar bear represents a chlorine atom, what does the ice cream represent in the drawing? What do you think the picture is trying to illustrate?

2. Would HCl be attracted to a charged wand? Explain your thinking.

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