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Ernest Rutherford used gold foil about how many atoms thick for the alpha-scattering experiment?

1. 500 atoms
2. 1000 atoms
3. 900 atoms
4. 700 atoms

Correct answer: 1000 atoms

Solution

Rutherford's gold foil experiment used an extremely thin gold foil so that most alpha particles could pass through it. The foil was about 1000 atoms thick. Hence, the correct answer is 1000 atoms.

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