Combined Science GCSE
Three-dimensional models
What Three-dimensional models means in Combined Science GCSE, as defined for AQA.
Definition of Three-dimensional models
Check what you remember
Read the wording for your board, then hide it and explain Three-dimensional models in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Show arrangement in space, but they can still misrepresent bond lengths, electron clouds and the scale of the structure.
Topics that use Three-dimensional models
- Covalent bonding (AQA GCSE)
Related terms
- Ball and stick models
- Counting atoms in models
- Covalent bonding as shared pairs of electrons
- Displayed formulae
- Dot-and-cross diagrams
- Electrical conductivity
- Fragments of giant covalent structures
- Full outer shells
Using Three-dimensional models in the exam
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