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Smells Unit – Investigation IV Polar Bears and Penguins.

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Presentation on theme: "Smells Unit – Investigation IV Polar Bears and Penguins."— Presentation transcript:

1 Smells Unit – Investigation IV Polar Bears and Penguins

2 © 2004 Key Curriculum Press. Unit 2 Investigation IV Admit Slip Consider the following illustration: (cont.) Draw the Lewis dot structure for HCl. 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?

3 © 2004 Key Curriculum Press. Unit 2 Investigation IV Agenda Admit Slip Comic Book Questions Exit Slip Product: Questions, Exit Slip Homework: Draw picture on last page!

4 © 2004 Key Curriculum Press. Unit 2 Investigation IV You will be able to: Recognize and explain a polar bond.

5 © 2004 Key Curriculum Press. Unit 2 Investigation IV Activity Purpose: 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.

6 © 2004 Key Curriculum Press. Classwork : Complete questions Classwork is due at: Unit 2 Investigation IV

7 © 2004 Key Curriculum Press. Unit 2 Investigation IV Making Sense What does electronegativity have to do with polarity?

8 © 2004 Key Curriculum Press. Unit 2 Investigation IV Exit Slip 1.Would hydrogen fluoride (HF) have a polar bond? Explain why. 2.How would the H and F atoms be portrayed in the comic book—as polar bears, penguins, or both? Explain. 3.Draw the partial charges next to the H and F atoms. 4.Draw a dipole arrow for the bond.

9 © 2004 Key Curriculum Press. Unit 2 Investigation IV Wrap-Up Anytime there are two different types of atoms sharing electrons, there will be a partial negative charge on one atom and a partial positive charge on the other atom. Electronegativity measures the tendency of an atom to attract the electrons in a bond. (cont.)

10 © 2004 Key Curriculum Press. Unit 2 Investigation IV The bonds are labeled nonpolar covalent, polar covalent, and ionic as the difference in electronegativity between the two atoms in the bond increases. (cont.)


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