Physical Science Chapter 3

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Across
  1. 2. used gold foil in his experiment
  2. 6. he thought atoms were made of only one type of atom
  3. 7. small particles that make up matter
  4. 9. the French scientist who developed the law of conservation of mass
  5. 13. matter made of one type of atom (starts with "e")
  6. 14. discovered the nucleus
  7. 17. the uncharged particle in the nucleus
  8. 19. the negatively charged particle outside the nucleus of an atom
  9. 21. atomic _______ tells the number of protons in an element
  10. 22. a mixture is physical, because the _______ of the substance is not changed
  11. 23. matter with the same composition throughout
  12. 26. discovered the proton
  13. 27. anything that has mass and takes up space
  14. 29. used the cathode ray tube
  15. 31. atoms of the same element with a different number of neutrons
  16. 32. a chemical combination of more than one element
Down
  1. 1. type of mixture that is the same throughout
  2. 3. elements are arranged on the periodic _______
  3. 4. Thomson's model of the atom resembles cookie _____.
  4. 5. _______ mass tells the average mass of all isotopes of an element
  5. 6. matter cannot be created or ______.
  6. 8. can be beaten into different shapes
  7. 10. a physical combination of different elements
  8. 11. the first person to use the term "atom"
  9. 12. type of mixture that is not the same throughout
  10. 15. the atomic _______ says atoms are made of one type of atom
  11. 16. discovered the neutron
  12. 18. shininess
  13. 20. electrons move randomly in energy levels within the electron ________
  14. 24. thought electrons moved like planets around the sun
  15. 25. the positively charged particle in the nucleus
  16. 28. discovered the electron
  17. 30. ________ number shows the number of protons + neutrons