Bonding models
I can compare bonding models, describe which models would be useful to show different aspects of bonding, and describe limitations of these models.
Bonding models
I can compare bonding models, describe which models would be useful to show different aspects of bonding, and describe limitations of these models.
Lesson details
Key learning points
- Scientists use models to represent parts of the natural world that are too difficult to observe or explain directly.
- There are multiple ways (models) of drawing/showing bonding.
- There are multiple advantages and limitations of particular representations and models.
Keywords
Model - used by scientists to represent parts of the natural world that are too difficult to observe or explain directly
Ball-and-stick model - used to represent the atoms and bonds in a chemical compound
Dot-and-cross diagram - used to show how chemical bonds are formed between atoms
Space-filling model - a 3D molecular model where the atoms are represented by spheres
Displayed formula - a 2D model of a covalent substance, showing all its atoms and bonds
Common misconception
Understanding that the models used to represent chemical story do not tell the complete story. Different models can be used to explain different aspects of bonding, but they all have limitations.
Avoid telling your class that the model is wrong; rather stress its limitations. Stress the idea that as we learn more about bonding, we will be able to use more sophisticated models to show and explain more key ideas.
Equipment
For students to make their own bonding models using either commercial bonding kits or using resources such as playdoh, plasticine, straws, polystyrene balls, pipe cleaners and beads.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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