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Smells Unit – Investigation II

Smells Unit – Investigation II. Lesson 2: Honk If You Like Molecules. Admit Slip. Examine the following molecules. What patterns do you see in the bonding of hydrogen, oxygen, carbon, and nitrogen?. Agenda. Admit Slip Notes Classwork Homework Product: Notes and Homework

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Smells Unit – Investigation II

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  1. Smells Unit – Investigation II Lesson 2: Honk If You Like Molecules

  2. Admit Slip • Examine the following molecules. What patterns do you see in the bonding of hydrogen, oxygen, carbon, and nitrogen? Unit 2 • Investigation II

  3. Agenda • Admit Slip • Notes • Classwork • Homework Product: Notes and Homework Homework: Last page of packet Unit 2 • Investigation II

  4. Today’s Objectives Students will be able to: • Explain the HONC 1234 Rule • Draw a structural formula for a molecule. • Determine whether the structural formula of a given molecule is possible. Unit 2 • Investigation II

  5. Structural Formulas 12 / 6 /10 • HONC 1234 is a phrase that helps us remember the bonding of hydrogen, oxygen, nitrogen and carbon. • Hydrogen (H) forms 1 bond. • Oxygen (O) forms 2 bonds. • Nitrogen (N) forms 3 bonds. • Carbon (C) forms 4 bonds. • Double bonds and triple bonds still follow the HONC 1234 rule. (They count as 2 or 3 bonds) Unit 2 • Investigation II

  6. Notes(cont.) • Molecules are isomers of one another if they have the same molecular formula but different structural formulas. Unit 2 • Investigation II

  7. Activity • Purpose: The purpose of this activity is to give you practice in creating structural formulas from molecular formulas and to help you begin to understand why atoms end up in the specific arrangements we find them in. (cont.) Unit 2 • Investigation II

  8. Time for Classwork! • If you finish early, work on the homework! Unit 2 • Investigation II

  9. Answer Review Unit 2 • Investigation II

  10. Molecular formula #1 (the same molecule drawn with two different orientations) (cont.) Unit 2 • Investigation II

  11. Molecular formula #2 (four different drawings are shown – three different molecules are represented) (cont.) Unit 2 • Investigation II

  12. Molecular formula #3 (four different drawings are shown – however, they represent only three different structures) (cont.) Unit 2 • Investigation II

  13. Making Sense • The third molecular formula has at least three possible structures. Are these all the same molecule? Explain. Unit 2 • Investigation II

  14. Exit Slip • Are the following molecules correct according to HONC 1234? If not, what specifically is wrong with them? 1. 2. Unit 2 • Investigation II

  15. Wrap-Up • The HONC 1234 rule tells us how many times hydrogen, oxygen, nitrogen and carbon tend to bond. • When a molecule is oriented differently in space it is still the same molecule. • A molecular formula can be associated with more than one distinct structural formula. Unit 2 • Investigation II

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