1. Describing Matter

2. Properties of matter
Chemistry The study of the properties of matter and how matter changes

3. Properties of Matter
Substance A single kind of matter that is pure having a specific makeup or composition and a specific set of properties

4. Properties of Matter Every form of matter has two kinds of properties,
physical properties and chemical properties

5. Properties of Matter
Physical Property Characteristic of a pure substance that can be observed without changing it into another substance
Examples Water, Ice, and steam
Hardness
Texture
Color

6. Properties of Matter
Chemical Property A characteristic of a pure substance that describes its ability to change into different substances
Examples Flammability
Rust
Baking

7. Elements
Element A pure substance that can not be broken down into any other substance by chemical or physical means.

8. Elements ARE the simplest substances.

9. Elements Atom A basic particle from which all elements are made
Atoms are different for each element

10. Elements
Chemical Bond When atoms combine, this is the force of attraction between two or more atoms. Atoms combine to form larger particles called molecules

11. Compounds
Compound A pure substance made of two or more elements chemically combined
IN A SET RATIO
Water H2O
Hydrogen = 2
Oxygen =
Total = 3

12. Compounds
Chemical Formula Shows the elements in the compound and the ratio of the atoms
Carbon dioxide CO2
Ratio 1 Carbon to Oxygen
If there is no number a 1 is understood
Sugar C6H12O6
Carbon 6
Oxygen 6
Hydrogen 12

13. Compounds
When elements are chemically combined they form compounds having properties that are different from those of the uncombined elements

14. Mixtures
Mixture Made of 2 or more substances– elements, compounds or both– that are together in the same place but are not chemically combined

15. Mixtures
Each substance in a mixture keeps its individual properties. Also , the parts of a mixture are not combined in a set ratio

16. Mixture Heterogeneous Mixture You can see the different parts
Examples-- sand
soup
salad

17. Mixture Homogeneous Mixture
Are so evenly mixed that you can not see the different parts
Examples Salt water
sugar water
A SOLUTION

18. Separating…Compounds vs Mixtures
Compounds are difficult to take apart
A Mixture is easy to separate
Ways of separating mixtures
Magnetic attraction
Filtering
Distillation
Evaporation