Atomic Theory Remediation

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Across
  1. 1. atom with positive charge
  2. 4. scientist who discovered the proton
  3. 5. Dalton's theory states that atoms of different elements combine to form chemical_______ in simple whole number ratios
  4. 7. all atoms of an element have the same number of protons (true or false)
  5. 9. the Law of Definite Properties states that chemical compounds always contain the same elements by ______.
  6. 13. scientist who believed that atoms were solid particles that could not be divided
  7. 16. used to discover the electron (3 words)
  8. 17. scientist who discovered the electron
  9. 18. atoms with positive or negative charge
Down
  1. 2. atoms with different masses
  2. 3. law of ________ of mass states that matter cannot be created or destroyed
  3. 6. all atoms of an element have the same number of neutrons (true or false)
  4. 8. discovered with gold foil experiment
  5. 10. Dalton believed that all atoms of an element have the _______ physical and chemical properties
  6. 11. the smallest unit of matter
  7. 12. scientist who discovered the neutron
  8. 14. discovered with beryllium experiment
  9. 15. atom with negative charge