1. Classifying Matter
The final Stage

2. Matter Pure Substances Mixtures Homogeneous Solutions Heterogeneous
Colloid
Emulsion
Suspension
Mechanical Mixture
Pure Substances
Compounds
Elements

3. At a glance…

4. Pure Substance or Mixture?
Pure Substance: a substance that contains only one kind of matter; and has a fixed composition
Mixture: substance consisting of two or more substances mixed together

5. Pure substances: Element or Compound
Element: From the Periodic table, substances that are made of 1 type of atom and cannot be separated into simpler substances.
Includes diatomic elements. Diatomic means two exact elements together like O2
Compound: more than one non diatomic element chemically combined in a fixed composition

6. Atoms to element…
Atom
Element

7. Element
Carbon
Sulphur

8. Atom to compound…

9. Compound: fixed composition

10. A fixed composition?
Law of definite proportions: Elements and compounds are made up of 2 or more elements combined together in definite ratios(proportions)
Table salt will always contain 1 sodium atom to 1 chlorine atom
NaCl has 1Na : 1Cl
H2O2 has 2H : 2 O

11. Mixture….

12. Mixture: Heterogeneous or Homogeneous
“Heterogeneous mixture” means seeing different kinds
“Homogeneous mixture”: seeing one kind (solution)

13. Homogeneous Mixture
Mix of two or more pure substances that mix together so well it looks like only one substance
1 Phase
Example: kool-aid or the alloy steel

14. Heterogeneous Mixture
A mixture containing two or more substances that are visible/separate
Examples: Density column, soil, pile of dice

15. Types: Ordinary mechanical mixture Examples: pizza, salad, soil.
Can identify various visible solid components.
Easily separated
Examples: pizza, salad, soil.

16. Heterogeneous Mixtures
Suspension: a heterogeneous fluid containing solid particles that are sufficiently large for sedimentation. (Ex. Flour in water)
Colloid: a substance microscopically dispersed evenly throughout another one (Ex. Milk)
Emulsion: a mixture of two or more immiscible (unblendable) liquids (Ex. Vinagrette

17. Atoms -Mixtures
Explain: