1. WHAT IS matter?

2. How do you classify matter?

3. MATTER
Pure substances
Mixtures

4. A pure substance has a constant composition (one phase).

5. A mixture has a variable composition (2 or more phases).
It is made of 2 or more pure substances which can be separated through physical changes : filtering, distillation, centrifugation, magnetism…..

6. Which is the pure substance? Which is the mixture?

7. Why does a chemist care?

8. MATTER
Pure substances
Mixtures

9. Pure substances
Compounds
Elements

10. Pure Substances
Cannot be separated by physical means: filtration, distillation, chromatography, mechanical extraction, settling, magnets

11. Elements
(on the periodic table)

12. Compounds
NaCl H2O
(chemical formulas)

13. How can we tell the difference between elements and compounds?

14. Compounds can be broken down into simpler units by heat and/or electricity.
NaCl Na Cl

15. Elements cannot be broken down chemically into simpler units by heat or electricity

16. MATTER
Pure substances
Compounds
Elements
Mixtures

17. Same properties throughout SOLUTIONS
Mixtures
Homogeneous mixtures
Heterogeneous mixtures
Same properties throughout
SOLUTIONS
Different properties in small samples
SALSA, MILK mechanical mixtures

18. HETEROGENEOUS MIXTURES
MATTER
PURE SUBSTANCES
ELEMENTS
COMPOUNDS
MIXTURES
HETEROGENEOUS MIXTURES
HOMOGENEOUS MIXTURES

19. TEST YOURSELF
Pg. 13 # 1 a-c, #3 Vocab through homogeneous mixture LSM 1.2 Info: this powerpoint pg in your text.