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Lesson 3: Visualizing Molecules with the Old Nobby Organic Chemistry Model Kit

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Lesson Plan • Chemistry (Structure & Bonding)

Lesson 3: Visualizing Molecules with the Old Nobby Organic Chemistry Model Kit

Build 3D molecules to understand shape, polarity, and isomers. Perfect for middle school through high school chemistry—or any visual learner.

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Old Nobby Organic Chemistry Model Kit

Old Nobby Organic Chemistry Model Kit (425 pcs)

Hands-on molecular modeling for hybridization, VSEPR shapes, resonance, stereochemistry, and more—ideal for homeschool labs and unit reviews.

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Download PDF Lesson Plan

(Print-ready checklist + build prompts. Upload your PDF to this path or replace with Media Library URL.)

Learning Objectives

  • Identify common molecular geometries (linear, trigonal planar, tetrahedral, trigonal pyramidal, bent).
  • Relate electron domains/hybridization (sp, sp2, sp3) to 3D shapes.
  • Distinguish structural vs. geometric isomers; introduce chirality (R/S) with models.
  • Connect 3D shape to polarity and intermolecular forces at a conceptual level.

Materials Needed

  • Old Nobby Organic Chemistry Model Kit (atoms, bonds, wedge/dash pieces)
  • Printed build cards or prompt list (included in PDF)
  • Notebook or lab sheet for sketches and reflections

Preparation & Setup (5–10 min)

  1. Sort atoms by color (C, H, O, N, halogens) and set out single/double bond connectors.
  2. Review VSEPR basics: electron domains → shape; define hybridization.
  3. Explain wedge/dash notation for 3D perspective and chirality.

Lesson Steps (35–50 min)

  1. Warm-Up (Shapes Quick Build): Build and label methane (CH4, tetrahedral), water (H2O, bent), ammonia (NH3, trigonal pyramidal), carbon dioxide (CO2, linear). Record bond angles.
  2. Hybridization Link: For each model, assign hybridization (CH4 → sp3, H2O → sp3, NH3 → sp3, CO2 → sp). Discuss how domains determine shape.
  3. Isomers Challenge: Build C2H6O in two ways (ethanol vs. dimethyl ether). Compare properties expected from structure.
  4. Geometric Isomers (Alkenes): Build 2-butene and show cis/trans. Discuss restricted rotation at double bonds.
  5. Intro to Chirality: Build lactic acid center model (or a simple four-different-substituent carbon). Create left/right hands and identify non-superimposability.
  6. Apply to Polarity: Decide if molecules are polar or nonpolar (e.g., CO2 nonpolar, H2O polar). Predict which has stronger intermolecular forces.

Discussion & Reflection

  • How does 3D shape change the way molecules interact?
  • Why can two molecules have the same formula but different properties?
  • Where do you see chirality in everyday life (e.g., hands, certain medicines)?

Extensions & Cross-Subject Links

  • Biology Link: Model amino acids; discuss protein folding and shape-function relationships.
  • Math Link: Estimate bond angles; compare to ideal values (109.5°, 120°, 180°).
  • Research: Pick a household molecule (citric acid, acetone, caffeine) and model its key features.

Parent & Teacher Tips

  • Use phones to take photos of builds; add labels/arrows digitally for a study gallery.
  • Have learners sketch each model—they remember better after drawing.
  • Color-code notes to match atom colors for quick visual recall.
  • Revisit models during later units (acids/bases, IMFs, organic reactions).

Wrap-Up

Physical models turn abstract chemistry into something you can hold. Building, rotating, and comparing structures develops real intuition about shape, polarity, and why molecules behave the way they do.

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