Atomic Theory

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Across
  1. 3. Particle composed of Protons Neutrons and Electrons that make up all matter & elements.
  2. 5. Smaller negative particles outside the nucleus.
  3. 6. The Greek philosopher that was the first to think of the atom's existence.
  4. 7. Dense positive center found in the gold foil test.
  5. 8. The positive particle found in the nucleus.
Down
  1. 1. A meteorologist who was the first to have experimental evidence and created four postulates.
  2. 2. Discovered the electron through the Cathode Ray Tube Experiment.
  3. 4. The neutral particle found in the nucleus.