Particle Physics

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Across
  1. 2. divided matter into four (five) elements: earth, air, water, fire, and cosmos(ether)
  2. 4. discovered new particle that he called neutron
  3. 7. charge is neutral and is roughly the same mass as the proton
  4. 8. comes from Greek word "a-tomos"
  5. 9. first elementary particle to be discovered
Down
  1. 1. experimented with "neutral" cathode rays
  2. 3. found nucleus in the atom
  3. 5. classified and sorted elements based on common chemical properties
  4. 6. supported the idea that atoms were "indivisible"