Cracking the Atomic Model Code

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Across
  1. 2. A subatomic particle with a positive charge found in the nucleus.
  2. 6. A particle that makes up an atom, such as a proton, neutron, or electron.
  3. 8. The smallest unit of an element that still has the properties of that element.
  4. 9. A very small particle with a negative charge.
  5. 12. A beam of particles used by Thomson in his experiments that led to the discovery of the electron.
  6. 14. MODEL Thomson’s model in which electrons were embedded in a positively charged sphere.
  7. 15. A specific amount of energy that an electron can have according to Bohr’s model.
  8. 16. The small, dense center of an atom where protons and neutrons are found.
  9. 17. The scientist who discovered the electron.
  10. 19. The scientist who described atoms as tiny, solid spheres.
  11. 20. The scientist who discovered the neutron.
Down
  1. 1. An experiment that provided evidence that atoms have a small, dense nucleus.
  2. 3. A subatomic particle with no electrical charge found in the nucleus.
  3. 4. Rutherford’s model showing that an atom has a small, dense nucleus and is mostly empty space.
  4. 5. MODEL A scientific representation used to describe the structure of an atom.
  5. 7. The scientist who proposed that electrons occupy specific energy levels.
  6. 10. The scientist who conducted the gold-foil experiment.
  7. 11. The modern model that describes where electrons are likely to be found.
  8. 13. The region around the nucleus where electrons are most likely to be found.
  9. 18. The fixed path where electrons were thought to move around the nucleus in Bohr’s model.