Review of Unit 2

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Across
  1. 5. established the law of conservation of mass
  2. 6. developed the atomic theory and solid sphere model
  3. 9. law in which states in a chemical change- matter is neither created nor destroyed
  4. 11. chemical combination of two or more different elements in a fixed proportion
  5. 13. combination of two or more substances in which the basic identity of each substance is not changed
  6. 14. smallest unit of matter
  7. 15. believed matter had a smallest unit and could not be divided
  8. 17. believed matter could be infinitely divided
  9. 18. changed Greek ideology, determined air was a mixture of gas
Down
  1. 1. developed the law of definite proportions
  2. 2. an observation made with measurement, numerical
  3. 3. simplest form of matter
  4. 4. an observation made without measurement, descriptive
  5. 7. the substance that is being dissolved when making a solution
  6. 8. a mixture that is the same throughout or homogenous
  7. 10. the substance that dissolves the solute when making a solution
  8. 12. matter with the same fixed composition and properties
  9. 16. a solid solution containing different metals and sometimes nonmetallic substances
  10. 17. period of 2000 years of qualitative science searching to purify, and perfect metals