Bonding Unit - Oakland Schools

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<strong>Bonding</strong> <strong>Unit</strong> Activity #6: Polar Bears and Penguins Questions What is polarity? How do you determine the polarity of molecules? How does polarity relate to electronegativity? How do you determine which end is positive and negative in polar molecules? Objective In this lesson you will be exploring polarity and bonding between atoms in greater detail. A comic book will provide new information about these topics and will introduce you to the concept of electronegativity, which helps us to understand partial charges. Teacher Notes For more informational background and detailed lesson plan see the following website from Key Curriculum Press, “Living by Chemistry” series. http://www.keypress.com/x7785.xml (Click on “Sample lesson – Teacher) Source Stacy, Angelica. LHS Living By Chemistry. Emeryville, CA: Key Curriculum Press, 2006. Website: http://www.keypress.com/x10.xml
Questions to answer Use the cartoon called “The Bare Essentials of Polarity” to answer the following questions. 1. How does the comic book define a “polar molecule?” 2. Define electronegativity as you understand it, after reading the first two pages of the comic book. 3. Interpret the picture at the bottom of page 1. Explain how the iceberg, penguins, and polar bears represent trends in electronegativity. 4. What is the artist trying to represent when there are two polar bears arm wrestling together or two penguins arm wrestling together? 5. What three types of bonds are represented on page 3 of the comic book? What happens to the bonding electrons in each type of bond? 6. Explain why there are four scoops of ice cream in the illustration of O 2 on page 3. 7. What do the six scoops of ice cream represent in the illustration of N 2 on page 4? 8. Describe what you think is happening to the penguin in the CO 2 molecule in the picture on page 4. 9. Name three things that the picture of CO 2 on page 4 illustrates about the molecule. 10. Describe what you think is happening to the penguins in the illustration of H 2 O on page 4. 11. Explain what you think the crossed arrow represents in the comic book. 12. What are the two definitions of “dipole” given in the comic book? Making sense What does electronegativity have to do with polarity? If you finish early… Using polar bears and penguins create an illustration showing a hydrogen sulfide molecule, H 2 S. (Hint: You may wish to start with a Lewis dot structure.)
Page 1 and 2: Oakland Schools Chemistry Resource
Page 3 and 4: Background Information: An easy way
Page 5 and 6: Drawing Lewis Structures for Covale
Page 7 and 8: Changes in Potential Energy in the
Page 9 and 10: Websites and Resources for Bonding
Page 11 and 12: the metal is pictured as an array o
Page 13 and 14: Name of Alloy Composition by Mass E
Page 15 and 16: Follow-Up Questions 1. What metal m
Page 17 and 18: Real-World Connections Ideas behind
Page 19 and 20: Teacher Notes: Build - A - Molecule
Page 21 and 22: Molecule Total number of atoms and
Page 23 and 24: Procedure You will conduct tests on
Page 25 and 26: Bonding Unit Activity #4: Molecular
Page 27 and 28: Procedure 1. Before entering the la
Page 29 and 30: Analysis and Conclusion Questions 1
Page 31 and 32: Station Directions Station 1: Bendi
Page 33 and 34: Station 8: Penny Stacker 1. Place t
Page 35 and 36: Station 3: Mini Lava Lamps 1. After
Page 37: Station 7: Stain Remover 1. Which s
Page 45 and 46: Bonding Unit Bond Length and Streng
Page 47 and 48: FIGURE 2
Page 49 and 50: Electronegativity Chart
Page 51 and 52: Bonding Unit Worksheet: Lewis Struc
Page 53 and 54: Answer Key: Lewis Structures, VSEPR
Page 55 and 56: Worksheet: Creative Compounds 1) Li

Bonding Unit - Oakland Schools

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