1. Classifying Matter: Elements, Compounds, and Mixtures
Charbonneau 2012

2. Atoms Elements Compounds Molecules
Pure Substances
A sample of matter that has definite chemical and physical properties.
Atoms
Elements
Compounds
Molecules

3. Elements
pure substance that cannot be separated into simpler substance by physical or chemical means.

4. Compounds
Pure substance composed of two or more different elements joined by chemical bonds.
Made of elements in a specific ratio
that is always the same
Has a chemical formula
Can only be separated by
chemical means, not physically
H2O
NaCl
CO2

5. Mixtures
A combination of two or more pure substances that are not chemically combined.
substances held together by physical forces, not chemical
No color, gas or heat change takes place
Each item retains its properties in the mixture
They can be separated physically
Chem4kids.com

6. One Element
The Same Element
(Gas)
(Solid)

7. A mixture of two elements
Another element
A mixture of two elements
This one likes to go round in pairs as a gas (molecules)

8. This is not a mixture, it is a COMPOUND of two different elements
This is just a mixture of two elements

9. Element, Compound or Mixture ?

10. Element, Compound or Mixture ?

11. Element, Compound or Mixture ?

12. Element, Compound or Mixture ?

13. Element, Compound or Mixture ?

14. Element, Compound or Mixture ?

15. Element, Compound or Mixture ?

16. Element, Compound or Mixture ?

17. Element, Compound or Mixture ?

18. Element, Compound or Mixture ?

19. Element, Compound or Mixture ?

20. Element, Compound or Mixture ?

21. Element, Compound or Mixture ?

22. A mixture of a compound and an element
Element, Compound or Mixture ?
A mixture of a compound and an element

23. What do we call these things?
An Atom
3 Atoms

24. What do we call these things?
6 Atoms which happen to be of 3 different elements

25. What do we call these things?
A Molecule
Yes, it also happens to be 2 atoms joined together but we don’t call it “2 atoms joined together” we say it is one molecule

26. What do we call these things?
A Molecule of a compound
2 molecules of a compound

27. What about when all the atoms are stuck together like in a solid element?

28. This is just a load of atoms in a solid element, it is not a big molecule

29. Finally, just to confuse you even more, science teachers like talking about
Particles
Particle is just a fancy name for individual things. These individual things could be atoms, molecules, lumps of soil, grains of sand, bits of metal. It doesn’t matter because particle is just a general word which is used when we don’t (or can’t) want to be exact about the type of things being described.

30. A good example of when science teachers use the word particle is when talking about air.
Air is a mixture of elements such as oxygen, argon and nitrogen mixed with compounds such as carbon dioxide

31. Some of the elements in air go around as single atoms (such as argon).
Or as molecules such as oxygen.
Compounds go around as molecules.

32. That’s why we talk about particles because it saves the bother of describing exactly what sort of things they are.

33. Can you identify the following?
You will be shown a series of photos. Tell if each photo represents an item composed of an element, compound, or mixture.
Review:
An element contains just one type of atom.
A compound contains two or more different atoms joined together.
A mixture contains two or more different substances that are only physically joined together, not chemically.
A mixture can contain both elements and compounds.

34. Element, Compound, or Mixture?
Rocks

35. Element, Compound, or Mixture?
Rocks

36. Element, Compound, or Mixture?
Copper

37. Element, Compound, or Mixture?
Copper Cu

38. Element, Compound, or Mixture?
Jelly Beans

39. Element, Compound, or Mixture?
Jelly Beans

40. Element, Compound, or Mixture?
Table Sugar

41. Element, Compound, or Mixture?
Table Sugar
C12H22O11

42. Element, Compound, or Mixture?
Diamond

43. Element, Compound, or Mixture?
Diamond C

44. Element, Compound, or Mixture?
Tea

45. Element, Compound, or Mixture?
Tea

46. Element, Compound, or Mixture?
Salt

47. Element, Compound, or Mixture?
NaCl
Salt

48. Element, Compound, or Mixture?
Neon Gas

49. Element, Compound, or Mixture?Ne
Neon Gas

50. Element, Compound, or Mixture?
Salad

51. Element, Compound, or Mixture?
Salad

52. Element, Compound, or Mixture?
Pure Water

53. Element, Compound, or Mixture?
Pure Water
H2O

54. Element, Compound, or Mixture?
Aluminum

55. Element, Compound, or Mixture?
Aluminum Al

56. Element, Compound, or Mixture?
Lemonade

57. Element, Compound, or Mixture?
Lemonade

58. Element, Compound, or Mixture?
Silver

59. Element, Compound, or Mixture?
Silver Ag

60. Element, Compound, or Mixture?
Sand

61. Element, Compound, or Mixture?
Sand

63. Notes Detailed notes are located at:
Flow Chart: