The document discusses the classification of matter into pure substances and mixtures. Pure substances are either elements or compounds, both of which have a uniform composition. Mixtures contain two or more substances mixed together, and can be either homogeneous, with a uniform composition throughout, or heterogeneous, with a non-uniform composition. Common examples of pure substances and mixtures are provided.

1. Matter Classification of Matter Matter Flowchart Pure Substances Mixtures

2. Matter Flowchart MATTER Can it be physically separated? Homogeneous Mixture (solution) Heterogeneos Mixture Compound Element yes no Is the composition uniform? yes Can it be chemically decomposed? Yes No No MIXTURE PURE SUBSTANCE

3. Matter Flowchart Examples: Graphite Pepper Sugar (sucrose) Paint Soda Element Hetero. mixture Compound Hetero. mixture Solution

4. Pure Substance A Pure substance is one which is made up of only one kind of particles All Elements and Compounds are Pure substance EX : Oxygen, nitrogen, iodine, iron, silicon, silver, gold , etc.

5. Pure Substances Element Composed of identical atoms Only one kind of atoms EX : copper wire, aluminum foil

6. Pure Substances Compound Composed of 2 or more elements in a fixed ratio Properties differ from those of individual elements EX : table salt (NaCl)

7. Pure Substances Law of Definite Composition A given compound always contains the same, fixed ratio of elements. Law of Multiple Proportions Elements can combine in different ratios to form different compounds.

8. Pure Substances For example… Two different compounds, each has a definite composition.

9. Mixture A Mixture contains two or more different kinds of particles (pure) All mixtures Are Impure

10. Mixtures Variable combination of 2 or more pure substances. Heterogeneous Homogeneous

11. Mixtures Homogeneous/Solution Uniform throughout Very small particles No Tyndall effect Particles don’t settle EX : rubbing alcohol Tyndall Effect

12. Mixtures Heterogeneous Not uniformed throughout Medium/large-sized particles Tyndall effect particles may or may not settle EX : milk, Blood

13. C. Mixtures Examples: Muddy water Saltwater Salad Dressing Blood Water + Milk Heterogeneous Homogeneous Heterogeneous Heterogeneous Homogenous