Atomic Chemistry Crossword

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Across
  1. 3. de Broglie proposed that electrons act as these
  2. 8. Each element has a unique line spectrum because no two elements have the same arrangement of these
  3. 9. His uncertainty principle states that it’s impossible to know both the momentum and position of an electron at the same time
  4. 10. Bohr’s model is called the _____ model
  5. 11. Atoms of different elements have different _____
  6. 13. Of the three main subatomic particles, this one has the smallest mass
  7. 14. He was the first to propose the idea of a smallest particle of matter, but his idea was rejected
  8. 16. Experiments with these led to the discovery of the electron
  9. 19. His was the first atomic model based on experimentation
  10. 20. General region of space where the location of an electron is most probable
  11. 21. This particle contributes to an atom’s mass but not its charge
Down
  1. 1. He discovered the neutron
  2. 2. This law refers to the set mass ratios between elements in a compound
  3. 4. Bohr did this type of experimentation
  4. 5. Means “indivisible”
  5. 6. His model is called the “Plum Pudding” model
  6. 7. His model included the discovery of the proton
  7. 12. Bohr explained that line spectra suggested electrons orbited on different _____ levels
  8. 15. The neutron was difficult to detect because it lacks this
  9. 17. Rutherford’s model relied on experimentation with this
  10. 18. This atomic part was discovered using the gold foil experiment