1. Classifying Matter:
Elements, Compounds, and Mixtures

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

3. Elements
 Small unit of matter
 Elements are a pure substance represented by chemical
symbols
 Example: Oxgyen  O; Carbon  C

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

5. Elements
 The following known elements make up MOST of the
Earth’s solid surface, living matter, oceans, and atmosphere.
C – Carbon (necessary for life)
Si - Silicon
H - Hydrogen
N - Nitrogen
O – Oxygen (most abundant)
Fe - Iron
Na - Sodium

6. 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

7. Can you identify the following?
You will be shown a series of photos. Tell if each photo
represents an item composed of an element or a compound.
Review:
 An element contains just one type of atom.
 A compound contains two or more different atoms joined
together.

8. Element or Compound?
Copper

9. Element or Compound?
Copper

10. Element or Compound?
Table Sugar

11. Element, Compound, or Mixture?
Table Sugar

12. Element or Compound?
Diamond

13. Element or Compound?
Diamond

14. Element or Compound?
Salt

15. Element or Compound?
Salt

16. Element or Compound?
Neon Gas

17. Element or Compound?
Neon Gas

18. PureWater
Element or Compound?

19. Element or Compound?
PureWater

20. Aluminum
Element or Compound?

21. Element or Compound?
Aluminum

22. Silver
Element or Compound?

23. Element or Compound?
Silver

25.  For extra help, check out:
www.chemistryforkids.net