UNIT 3. MIXTURES AND PURE
SUBSTANCES

Pure substances
Mixtures
VOCABULARY
 Complete as follows…
Matter=
Physical=
Chemical=
Means=
Joined=
Procedure=

Retains=
Distilled=
Pure Substances
 A portion of matter that has definite chemical and physical

properties.

carbon dioxide (CO2), water (H...
One kind of pure substance:
Elements
 Pure substance formed by one type of atom that cannot be

separated into simpler su...
Other kind of pure substance:
Compounds
 Pure substance composed of two or more different

elements joined by chemical bo...
Mixtures
 A combination of two or more pure substances that are not

chemically combined.
 Each substance retains its pr...
Can you identify the following?
You are going to see a series of photos. Say if each photo
represents an element, compound...
Element, Compound, or Mixture?
Rocks
Element, Compound, or Mixture?
Rocks
Element, Compound, or Mixture?
Copper
Element, Compound, or Mixture?
Copper
Element, Compound, or Mixture?
Jelly Beans
Element, Compound, or Mixture?
Jelly Beans
Element, Compound, or Mixture?
Table Sugar
Element, Compound, or Mixture?
Table Sugar
Element, Compound, or Mixture?
Diamond
Element, Compound, or Mixture?
Diamond
Element, Compound, or Mixture?
Tea
Element, Compound, or Mixture?
Tea
Element, Compound, or Mixture?
Salt
Element, Compound, or Mixture?
Salt
Element, Compound, or Mixture?
Neon Gas
Element, Compound, or Mixture?
Neon Gas
Element, Compound, or Mixture?
Salad
Element, Compound, or Mixture?
Salad
Element, Compound, or Mixture?
Distilled Water
Element, Compound, or Mixture?
Distilled Water
Element, Compound, or Mixture?
Aluminum
Element, Compound, or Mixture?
Aluminum
Element, Compound, or Mixture?
Lemonade
Element, Compound, or Mixture?
Lemonade
Element, Compound, or Mixture?
Silver
Element, Compound, or Mixture?
Silver
Element, Compound, or Mixture?
Sand
Element, Compound, or Mixture?
Sand
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...
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Unit 3. Mixtures and Pure Substances

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Unit 3. Mixtures and Pure Substances

  1. 1. UNIT 3. MIXTURES AND PURE SUBSTANCES Pure substances Mixtures
  2. 2. VOCABULARY  Complete as follows… Matter= Physical= Chemical= Means= Joined= Procedure= Retains= Distilled=
  3. 3. Pure Substances  A portion of matter that has definite chemical and physical properties. carbon dioxide (CO2), water (H2O), nitrogen dioxide (NO2)…
  4. 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. 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. 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. 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. 8. Element, Compound, or Mixture? Rocks
  9. 9. Element, Compound, or Mixture? Rocks
  10. 10. Element, Compound, or Mixture? Copper
  11. 11. Element, Compound, or Mixture? Copper
  12. 12. Element, Compound, or Mixture? Jelly Beans
  13. 13. Element, Compound, or Mixture? Jelly Beans
  14. 14. Element, Compound, or Mixture? Table Sugar
  15. 15. Element, Compound, or Mixture? Table Sugar
  16. 16. Element, Compound, or Mixture? Diamond
  17. 17. Element, Compound, or Mixture? Diamond
  18. 18. Element, Compound, or Mixture? Tea
  19. 19. Element, Compound, or Mixture? Tea
  20. 20. Element, Compound, or Mixture? Salt
  21. 21. Element, Compound, or Mixture? Salt
  22. 22. Element, Compound, or Mixture? Neon Gas
  23. 23. Element, Compound, or Mixture? Neon Gas
  24. 24. Element, Compound, or Mixture? Salad
  25. 25. Element, Compound, or Mixture? Salad
  26. 26. Element, Compound, or Mixture? Distilled Water
  27. 27. Element, Compound, or Mixture? Distilled Water
  28. 28. Element, Compound, or Mixture? Aluminum
  29. 29. Element, Compound, or Mixture? Aluminum
  30. 30. Element, Compound, or Mixture? Lemonade
  31. 31. Element, Compound, or Mixture? Lemonade
  32. 32. Element, Compound, or Mixture? Silver
  33. 33. Element, Compound, or Mixture? Silver
  34. 34. Element, Compound, or Mixture? Sand
  35. 35. Element, Compound, or Mixture? Sand
  36. 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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