Classifying Matter

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Across
  1. 3. A small particle
  2. 5. Boron is a ----------
  3. 6. This drink is a mixture
  4. 8. Carbon Dioxide's two
  5. 11. The amount of ways atoms can combine
  6. 12. Number of protons in boron
  7. 14. mixture that is evenly mixed
  8. 17. Make up part of the nucleus
  9. 18. Can be separated by physical methods like
  10. 19. The composition is always the same
  11. 20. substance that has two or more elements bonded
Down
  1. 1. Atomic mass of aluminum rounded
  2. 2. help explain how atoms combine
  3. 4. a mixture that is not evenly mixed
  4. 7. form a solution by mixing evenly
  5. 9. Make up the other part of the nucleus
  6. 10. Example of a nonmetal
  7. 11. Matter that can vary in composition
  8. 13. Substance that is made of one type of atom
  9. 15. These atoms in air always exist in pairs
  10. 16. Has mass and takes up space