Chapter 2

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Across
  1. 2. closeness of a measurement to the actual value
  2. 4. letter(s) that represent an element
  3. 5. all of the particles in the sample are identical
  4. 8. quantity of matter in a sample
  5. 10. separation technique based upon boiling points
  6. 15. sample with uneven composition (can see different parts)
Down
  1. 1. observation that is non numerical
  2. 3. sample with uniform composition (cannot see different parts)
  3. 6. sample containing only one kind of atom
  4. 7. mass/volume
  5. 9. physical blend of two or more pure substances; each retaining their own properties
  6. 11. anything that has mass and volume
  7. 12. the study of matter and how that matter interacts
  8. 13. formed when two or more elements combine chemically
  9. 14. interval between events