History of the Atom Crossword

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Across
  1. 5. Created orbitals
  2. 8. Equipment Thomson used
  3. 10. Defined an element as any substance that cannot be decomposed into a smaller substance
  4. 11. Said there were 4 elements
  5. 15. Orbits were not always circular but in a pattern
  6. 17. Model developed by Thomson
  7. 19. Discovered neutron
  8. 20. Created uncertainty principle
Down
  1. 1. Nuclear Atom Model
  2. 2. developed the idea of atoms
  3. 3. refined Rutherfords idea
  4. 4. Milikan's experiment
  5. 6. Neutral particle
  6. 7. Greek for indivisible
  7. 9. Gold foil experiment
  8. 12. Billiard ball model
  9. 13. Bohr's model of atom
  10. 14. Discovered electron
  11. 16. Experiment that led to discovery of nucleus
  12. 18. Discovered charge and mass of an electron