Physical Science Chapter 3

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