1. Classification of Matter

2. Classification of Matter
Pure Substance – Matter that has only 1 set of chemical and physical properties.
Example: Pure water always has the exact same chemical and physical properties under the same conditions.

3. Classification of Matter
Mixture – Two or more pure substances mixed together. Each substance in the mixture retains its own set of chemical and physical properties.
Even though it may look different, it is still copper and zinc. Each metal retains its own properties like melting point.
Example: Copper and Zinc can be mixed together to produce brass.

4. Mixtures Heterogeneous mixture – Uneven distribution of substances.
- You can see the different parts.
Examples:
Sand
Granite
Wood

5. Mixtures
Homogeneous Mixture (Solutions) – Components are evenly mixed.
- Cannot see the different parts.
Salt water contains salt and water, but are mixed all the way to the atomic level
-but, it can still be separated by physical means.
Seawater distillation plant

6. Mixtures
Homogenous Mixtures can be solid, liquid or gas, but are still called solutions.
Examples:
Alloys, like steel, are a solution of metals.
Air is a solution of gases.
They are solutions because the substances are mixed evenly and appear to be one substance.

7. Mixtures
Some mixture appear homogenous with the naked eye, but are heterogeous when viewed with a micrscope.
- You can see the different parts with a microscope.
Examples:
Milk
Blood

8. Pure Substances compounds and elements
Pure substances can also be divided into 2 categories:
compounds and elements
Compounds and elements are pure substances because they have constant physical properties.
Examples of Physical properties are:
boiling point, melting point, and density

9. Pure Substances
Elements – Substances made up of only one type of individual atoms.
- Cannot be separated by any physical OR chemical process.
Examples:Carbon
Helium
Gold

10. Pure Substances
Compound – Two or more elements chemically bonded together.
Examples:
Carbon Dioxide (CO2)
Water (H2O)
Salt (NaCl)
Sucrose (C12H22O11)

11. Pure Substances
Compounds have only 1 set of properties. They cannot be separated by any physical process.
- Can only be separated by a chemical reaction.
Water can be separated into Hydrogen and Oxygen by a process called Electrolysis.

12. Matter Mixture Element Pure Substance Compound
Can be separated physically
Cannot be separated physically
Mixture
Pure Substance
Can be separated chemically
Can see the parts
Cannot see the parts
Heterogeneous Mixture
Compound
Cannot be separated
Homogeneous Mixture (solutions
Element