1. Elements, Compounds, Mixtures
Classifying Matter
Elements, Compounds, Mixtures

2. Remember..
Matter is anything that has mass and takes up space

3. Classify
In order to classify matter more specifically, you must ask yourself:
“Can it be separated by a physical
process?”

4. Classify If the answer is NO, then the sample of matter is a:
Pure Substance

5. Classify Pure substances can be either elements or compounds
To classify pure substances more specifically, you must ask yourself…
“Can it be separated by a chemical
process?”

6. Classify
If the answer is NO, then the sample of matter is an:
Element

7. Element An element is one or more of the same type of atoms
Basically, if it’s on the periodic table, and it’s the only substance present, it’s an element

8. Element
Examples:
Nitrogen, Oxygen, Aluminum, Hydrogen

9. Classify
If the answer is YES, it can be separated by chemical means, then the sample of matter is a:
Compound

10. Side Note…
Molecule: any 2 or more atoms chemically combined (put together) Cl H H Cl H H O

11. Side Note:
Compound: any 2 or more atoms of different elements chemically combined (put together) H H Na O Cl

12. Let’s try making some molecules and compounds…

13. Classify
Compound: any two or more atoms of different elements chemically combined (put together)
Basically, if all that is in a sample of matter is one kind of compound, it’s a compound

14. Compound Examples: Water, Sodium Chloride, Carbon Dioxide,
Hydrochloric Acid, Sulfuric Acid

15. Classify
Back to the first question: “can it be separated by a physical process?”
If the answer is YES, then the sample of matter is a:
Mixture

16. Mixture
Mixture: A sample of matter in which 2 or more types of substances are physically mixed, not chemically combined (put together)

17. Classify
To classify a mixture more specifically, you must ask yourself:
“does the mixture have uniform
composition throughout?”

18. Classify If the answer is YES, then the sample of matter is a:
Homogeneous Mixture

19. Homogeneous Mixture
Homogeneous: Uniform composition throughout the sample of matter
Basically, if it is a mixture, and it looks the same throughout the whole thing, then it is a homogeneous mixture.

20. Homogeneous Mixture
Examples:
Air, Salt Water, Brass, Sugar Water

21. Classify
If the answer is NO, the sample of matter does not have uniform composition throughout, then it is a:
Heterogeneous Mixture

22. Heterogeneous Mixture
Heterogeneous: no uniform composition throughout the sample of matter
Basically, if it is a mixture, and clearly two or more separate things, it is a heterogeneous mixture

23. Heterogeneous Mixture
Examples:
A pocket full of pennies and quarters,
A few marbles in a glass of water,
An aquarium with fish in it,
Oil and water

24. Let’s identify some matter…