19. Classifying Materials

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Across
  1. 3. First element on the periodic table
  2. 7. no new substances are made
  3. 8. a pure substance made from two more different elements that are chemically combinded
  4. 9. new substance made
  5. 11. Al
  6. 12. good conductors of heat and electricity
  7. 13. Au
Down
  1. 1. made of two or more different types of particles mingled together
  2. 2. table that contains all the known elements
  3. 4. Cu
  4. 5. H20
  5. 6. explodes when you put it in water
  6. 7. made of particles that area all the same
  7. 10. a pure substance that cannot be broken down into simple substances by chemical means