Development of the atomic model
What Development of the atomic model means in Chemistry GCSE, as defined for AQA.
Definitions of Development of the atomic model
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Reference: AQA
The atomic model changed over time as new experimental evidence emerged, moving from Dalton's solid spheres through Thomson's plum pudding model and Rutherford's nuclear atom to Bohr's electron shells and the modern model.
The nuclear model replaced the plum pudding model because it explained the deflections that the plum pudding model could not.
This breakthrough completed the modern nuclear model, about 20 years after the nucleus became an accepted idea.
Topics that use Development of the atomic model
Related terms
- Acceptance of scientific models
- Alpha particle scattering
- Atomic number
- Discovery of the neutron
- Evidence and scientific explanation
- Evidence-based model change
- Experimental testing of models
- Key experiments in atomic history
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