1. Matter
All matter is composed of atoms and groups of atoms bonded together, called molecules.
Substances that are made from one type of atom only are called pure substances.

2. Matter
All matter is composed of atoms and groups of atoms bonded together, called molecules.
Substances that are made from one type of atom only are called pure substances.
Substances that are made from more than one type of atom bonded together are called compounds.
Compounds that are combined physically, but not chemically, are called mixtures.

3. Matter
All matter is composed of atoms and groups of atoms bonded together, called molecules.
Substances that are made from more than one type of atom bonded together are called compounds.

4. Matter
All matter is composed of atoms and groups of atoms bonded together, called molecules.
Compounds that are combined physically, but not chemically, are called mixtures.

5. Elements, Compounds, Mixtures
Sodium is an element.
Chlorine is an element.
When sodium and chlorine bond they make the compound sodium chloride, commonly known as table salt.
Compounds have different properties than the elements that make them up.
Table salt has different properties than sodium, an explosive metal, and chlorine, a poisonous gas.

6. Elements, Compounds, Mixtures
Hydrogen is an element.
Oxygen is an element.
When hydrogen and oxygen bond they make the compound water.
When salt and water are combined, a mixture is created. Compounds in mixtures retain their individual properties.
The ocean is a mixture.

7. Elements, compounds, and mixtures
Mixtures can be separated by physical means.
Compounds can only be separated by chemical means.
Elements are pure substances. When the subatomic particles of an element are separated from its atom, it no longer retains the properties of that element.

8. DO NOW
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9. Mixtures can be separated
Mixtures can be separated by physical means

10. Separating Mixtures
Substances in a mixture are physically combined, so can be separates
Numerous techniques have been developed to separate mixtures to study components
Magnetism
Filtration
Distillation
Crystallization
Chromatography

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12. Filtration
Used to separate heterogeneous mixtures composed of solids and liquids
Uses a porous barrier to separate the solid from the liquid
Liquid passes through leaving the solid in the filter paper

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14. Distillation Used to separate homogeneous mixtures
Based on differences in boiling points of substances involved

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16. Crystallization
Separation technique that results in the formation of pure solid particles from a solution containing the dissolved substance
As one substance evaporates, the dissolved substance comes out of solution and collects as crystals
Produces highly pure solids
Rocky candy is an example of this

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18. Chromatography
Separates components of a mixture based on ability of each component to be drawn across the surface of another material
Mixture is usually liquid and is usually drawn across chromatography paper
Separation occurs because various components travel at different rates
Components with strongest attraction for paper travel the slowest

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