This document discusses the classification of pure substances and mixtures. It defines elements as pure substances that cannot be broken down further, compounds as pure substances made of two or more elements chemically bonded together, and mixtures as physical combinations of substances that are not chemically bonded and can be separated. Examples of each are given, such as copper being an element, salt being a compound of sodium and chlorine, and a salad being a mixture of various ingredients. Criteria for identifying elements, compounds and mixtures are outlined.

1. Classifying Matter:
Elements, Compounds, and Mixtures

2. Pure Substances
A sample of matter that has definite chemical and physical
properties.

3. Elements
Remember:
Elements are pure substance that cannot be separated into
simpler substance by physical or chemical means.
We classify elements into the Periodic table:

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

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

6. Mixtures vs. Compounds

7. Can you identify the following?
Construct a table in your book with 3 columns, with the
headings element, compound, and mixture. You will be
shown a series of photos. Can you tell which of the three
headings each photo represents? Write the answers into your
table.
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.

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?
Pure Water

27. Element, Compound, or Mixture?
Pure 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

37. Notes
Detailed notes are located at:
http://www.middleschoolscience.com/elements-compounds-mixtu
Flow Chart:
http://www.middleschoolscience.com/matter-flow-chart-isn.pdf