Science Review (1-3)

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Across
  1. 3. middle of periodic table
  2. 4. left side of periodic table
  3. 5. replaced in nature
  4. 6. right side of periodic table
  5. 7. evenly mixed
  6. 10. one atom
Down
  1. 1. unevenly mixed
  2. 2. hammered into sheets
  3. 8. substance not blended together
  4. 9. used faster than replaced