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Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
Unit 3. Mixtures and Pure Substances
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Unit 3. Mixtures and Pure Substances

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  • 1. UNIT 3. MIXTURES AND PURE SUBSTANCES Pure substances Mixtures
  • 2. VOCABULARY  Complete as follows… Matter= Physical= Chemical= Means= Joined= Procedure= Retains= Distilled=
  • 3. Pure Substances  A portion of matter that has definite chemical and physical properties. carbon dioxide (CO2), water (H2O), nitrogen dioxide (NO2)…
  • 4. One kind of pure substance: Elements  Pure substance formed by one type of atom that cannot be separated into simpler substance by physical or chemical means • Ex. Physical means: distillation, filtration… • Ex. Chemical means: chemical reaction: substitution, reduction…  Its symbol in the periodic table is its chemical formula
  • 5. Other kind of pure substance: Compounds  Pure substance composed of two or more different elements joined by chemical bonds.  Has a chemical formula with at least two different letter.  Can only be separated by chemical procedures, not physically.
  • 6. Mixtures  A combination of two or more pure substances that are not chemically combined.  Each substance retains its properties in the mixture and has his own chemical formula.  They can be separated physically.  There are two types: homogeneous and heterogeneous, depending on the capacity of distinguish the different components or not.
  • 7. Can you identify the following? You are going to see a series of photos. Say if each photo represents an element, compound, or mixture. Review:  An element is a pure substance which contains just one type of atom.  A compound is a pure substance which contains two or more different atoms joined together.  A mixture contains two or more different substances that are only physically joined together, not chemically.
  • 8. Element, Compound, or Mixture? Rocks
  • 9. Element, Compound, or Mixture? Rocks
  • 10. Element, Compound, or Mixture? Copper
  • 11. Element, Compound, or Mixture? Copper
  • 12. Element, Compound, or Mixture? Jelly Beans
  • 13. Element, Compound, or Mixture? Jelly Beans
  • 14. Element, Compound, or Mixture? Table Sugar
  • 15. Element, Compound, or Mixture? Table Sugar
  • 16. Element, Compound, or Mixture? Diamond
  • 17. Element, Compound, or Mixture? Diamond
  • 18. Element, Compound, or Mixture? Tea
  • 19. Element, Compound, or Mixture? Tea
  • 20. Element, Compound, or Mixture? Salt
  • 21. Element, Compound, or Mixture? Salt
  • 22. Element, Compound, or Mixture? Neon Gas
  • 23. Element, Compound, or Mixture? Neon Gas
  • 24. Element, Compound, or Mixture? Salad
  • 25. Element, Compound, or Mixture? Salad
  • 26. Element, Compound, or Mixture? Distilled Water
  • 27. Element, Compound, or Mixture? Distilled Water
  • 28. Element, Compound, or Mixture? Aluminum
  • 29. Element, Compound, or Mixture? Aluminum
  • 30. Element, Compound, or Mixture? Lemonade
  • 31. Element, Compound, or Mixture? Lemonade
  • 32. Element, Compound, or Mixture? Silver
  • 33. Element, Compound, or Mixture? Silver
  • 34. Element, Compound, or Mixture? Sand
  • 35. Element, Compound, or Mixture? Sand
  • 36. exercises 1)Complete the statements in your notebook: a) b) c) d) e) f) g) A mixture is a group of two or more ……………. All pure substances have a constant chemical ……….. A mixture can be separated by ……………. means A pure substance like a compound can be separated by ………… means An element is a pure substance composed by one type of ………. A heterogeneous mixture can be identified using your ………. A homogeneous mixture needs a ………………… to distinguish all the components

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