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What discovery led J.J. Thomson to decide that atoms were not indivisible, but are actually composed of smaller parts?

2 Answers

3 votes

Answer:

Thomson used a beam of negatively charged particles.

Step-by-step explanation:

User Tahlia
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Thomson used a beam of negatively charged particles. Using a beam of particles and detecting the scattering of the particles after they hit gold foil.
User Daniel Wyatt
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