ModelingAtoms

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Across
  1. 2. Thomson discovered the ______, a subatomic particle.
  2. 4. Today’s model uses _______.
  3. 6. Bohr thought that electrons moved around in _____.
  4. 8. Rutherford came up with the ______.
  5. 9. Dalton observed that _____ seemed to combine as if they were many individual particles.
Down
  1. 1. At first, atoms were thought to be ______.
  2. 3. Dalton first came up with the idea that atoms differed based on their _____.
  3. 5. Rutherford realized that atoms were mainly just ________.
  4. 7. Matter has mass and _____.
  5. 10. Democritus thought that atoms were different ____.