History of the Atomic Model | GCSE Physics Practice
Our understanding of the atom has changed over time as new evidence was discovered.
Why did the plum pudding model have to be replaced?
What is History of the Atomic Model | Practice?
"The scientific history of how our understanding of atoms has evolved."
Who proposed the 'Plum Pudding' model of the atom?
Niels Bohr changed the atomic model by suggesting that electrons ____.
In the Thomson plum pudding model, what was the 'pudding'?
Model Timeline
Dalton (solid spheres).
Thomson (plum pudding - discovered electrons).
Rutherford (alpha scattering - discovered empty space & nucleus).
Bohr (energy levels/shells).
Evidence Fact: Rutherford's experiment showed that most alpha particles pass straight through gold foil.
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