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More about shape

Structure meets function. More about shape. You should be able to:. Check Lewis dot structures by looking at total valence electrons. Identify resonance structures and molecules that do not apply the “octet” rule. Identify isomers. Drawing VESPR shapes. Lewis dot structures: A, X, E

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More about shape

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  1. Structure meets function More about shape

  2. You should be able to: • Check Lewis dot structures by looking at total valence electrons. • Identify resonance structures and molecules that do not apply the “octet” rule. • Identify isomers

  3. Drawing VESPR shapes • Lewis dot structures: A, X, E • Way to check: • Add up the total valence electrons associated with all of the atoms in the molecule. • Make sure the number of lone pairs and bonded pairs (on all the molecules) add up to that number.

  4. Try it! • Draw: NF3 • Check: Use the total valence electrons rule. • Use your table and AXE to identify shape.

  5. Is it always an octet? • Draw: BF3 • Draw: SCl6 : Here you may need to use the total valence electrons to figure out how to draw the structure. • Explain how these don’t follow the octet rule.

  6. Resonance • Draw: O3 • Why is it difficult to draw? • Resonance: There are multiple forms of a molecule and the molecule is most stable when all forms are present.

  7. What does resonance mean?

  8. How is ozone formed?

  9. Why is ozone important?

  10. Isomers • Sometimes molecules can have the same molecular formula and more than one structural formula. These are called “isomers”.

  11. Examples of isomers • Do you think these isomers function the same? Why or why not?

  12. Draw an isomer of propane

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