Chemistry for the gifted and talented: bonding models

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This activity gets the students to think of the model they have been taught as a model rather than the truth.

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Bonding models
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Wales
- GCSE
  - WJEC Combined science
    - Unit 5: Chemistry 2
      - 5.1 BONDING, STRUCTURE AND PROPERTIES
        (c) electronic structure in explaining how ionic bonding takes place (and how this is represented using dot and cross diagrams)
        (d) the accepted structural model for giant ionic structures in explaining the physical properties of ionic compounds
        (e) electronic structure in explaining how covalent bonds are formed (and how this is represented using dot and cross diagrams)
        (f) the intermolecular bonding structural model for simple molecular structures in explaining the physical properties of simple molecular substances
  - WJEC Chemistry
    - Unit 2: CHEMICAL BONDING, APPLICATION OF CHEMICAL REACTIONS and ORGANIC CHEMISTRY
      - 2.1 BONDING, STRUCTURE AND PROPERTIES
        (c) electronic structure in explaining how ionic bonding takes place (and how this is represented using dot and cross diagrams)
        (d) the accepted structural model for giant ionic structures in explaining the physical properties of ionic compounds
        (e) electronic structure in explaining how covalent bonds are formed (and how this is represented using dot and cross diagrams)
        (f) the intermolecular bonding structural model for simple molecular structures in explaining the physical properties of simple molecular substances
- A/AS level
  - WJEC Chemistry
    - Unit 1: THE LANGUAGE OF CHEMISTRY, STRUCTURE OF MATTER AND SIMPLE REACTIONS
      - 1.4 Bonding
        (a) ionic bonding in terms of ion formation and the interaction between positive and negative ions in an ionic crystal
        (b) covalent bonding, including coordinate bonding, in terms of the sharing of electrons and the balance of forces of attraction and repulsion within the molecule
Republic of Ireland
- Leaving Certificate
  - Chemistry
    - 2. Chemical bonding
      - 2.2 Ionic Bonding
        Depth of treatment
        Sodium chloride crystal structure.
        Activities
        Representation of ionic bonds using dot and cross diagrams.
        Examination of a model of the NaCl crystal.
    - Option 2A: Materials
      - 2A.1 Crystals
        Depth of treatment
        Ionic, molecular, metallic and covalent macromolecular crystals - physical properties related to the crystal binding forces.

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