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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

Smells Unit – Investigation II

Lesson 2:

Honk If You Like Molecules


Admit slip
Admit Slip

  • Examine the following molecules. What patterns do you see in the bonding of hydrogen, oxygen, carbon, and nitrogen?

Unit 2 • Investigation II


Agenda
Agenda

  • Admit Slip

  • Notes

  • Classwork

  • Homework

    Product: Notes and Homework

    Homework: Last page of packet

Unit 2 • Investigation II


Today s objectives
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


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


Notes(cont.)

  • Molecules are isomers of one another if they have the same molecular formula but different structural formulas.

Unit 2 • Investigation II


Activity
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


Time for classwork
Time for Classwork!

  • If you finish early, work on the homework!

Unit 2 • Investigation II


Answer Review

Unit 2 • Investigation II


(cont.)

Unit 2 • Investigation II


  • Molecular formula #2 (four different drawings are shown – three different molecules are represented)

(cont.)

Unit 2 • Investigation II


  • Molecular formula #3 (four different drawings are shown – however, they represent only three different structures)

(cont.)

Unit 2 • Investigation II


Making sense
Making Sense

  • The third molecular formula has at least three possible structures. Are these all the same molecule? Explain.

Unit 2 • Investigation II


Exit slip
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


Wrap up
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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