Atomic theory

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Across
  1. 2. The gold foil experiment contributed to the discovery of
  2. 3. Protons have --- charge
  3. 6. What was the particle discovered by Thomson?
  4. 7. What particles did Rutherford use for his experiment?
  5. 9. Which scientist described the atoms as “a positively charged core (nucleus) in the middle of a lot of empty
  6. 11. What experiment did J.J. Thomson conduct to discover the electron, and what was the main conclusion of this experiment?
Down
  1. 1. Democritus considered the atom to be...
  2. 4. What key concept did Democritus introduce regarding the nature of matter?
  3. 5. Electrons have --- charge
  4. 8. What were the particles that Rutherford discovered?
  5. 10. Which researcher first disproved Dalton’s atomic model?