Model limitations
What Model limitations means in Chemistry GCSE, as defined for AQA.
Definitions of Model limitations
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Reference: AQA
Each model has limits: dot and cross diagrams show electrons but not shape, ball and stick models show three-dimensional shape but not electron pairs, and two-dimensional diagrams can hide the true shape.
What dot and cross, ball and stick, and two- and three-dimensional diagrams show and do not show when representing a giant ionic structure.
Topics that use Model limitations
- Covalent bonding (AQA GCSE)
- Ionic compounds (AQA GCSE)
Related terms
- Addition polymerisation
- Bond strength and energy transfer
- Conduction by free-moving ions
- Covalent bonding
- Diamond
- Dot and cross diagrams
- Electrostatic attraction
- Electrostatic attraction between oppositely charged ions
Using Model limitations in the exam
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