History of Atomic Models Worksheet
Explore the evolution of atomic models from ancient Greek philosophy to modern quantum mechanics with this comprehensive worksheet.
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History of Atomic Models
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Read each question carefully and provide thoughtful answers based on your knowledge of the history of atomic models. Some questions may require critical thinking and comparison of different models.
1. Which scientist proposed the 'plum pudding' model of the atom?
John Dalton
Ernest Rutherford
J.J. Thomson
Niels Bohr
2. The Rutherford gold foil experiment led to the discovery of the:
electron
proton
neutron
nucleus
3. Democritus first proposed the idea of indivisible particles called .
4. The Bohr model suggested that electrons orbit the nucleus in specific energy .
5. The quantum mechanical model describes electrons in terms of of probability.
6. Dalton's atomic theory stated that atoms of the same element are identical in all respects.
True
False
7. The most significant limitation of the Bohr model was its inability to explain the spectra of multi-electron atoms.
True
False
Match each scientist with their primary contribution to atomic theory.
8. Dalton
a. Discovered the electron
9. Thomson
b. Proposed the nuclear model
10. Rutherford
c. Developed the first atomic theory based on experimental evidence
11. Bohr
d. Introduced quantized energy levels for electrons
12. Briefly explain how the discovery of the electron changed Dalton's atomic theory.
13. Describe one key difference between the Bohr model and the quantum mechanical model of the atom.
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