Elements, Compounds

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Elements, Compounds Mixtures
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Elements

• An element is a pure substance (only 1 type of
  particle) that cannot be separated into simpler
  substances by physical or chemical means.

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Element
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Compounds

• A compound is a pure substance composed of 2 or
  more elements that are chemically combined.

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Examples of Compounds

• Compounds contain elements
• The elements combine lose their original
  properties
• Compounds CAN be separated by chemical means
• The elements combine in specific ratios

Sodium (Na) Chlorine (Cl) NaCl
Hydrogen (H) Oxygen (O) H2O
Carbon (C) Oxygen (O) CO2
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Mixtures

• A mixture is a combination of 2 or more
  substances that are not chemically combined.

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Examples of Mixtures
chicken noodle soup
salad
pizza yes, that would be Yoda

• Properties of Mixtures
• Each substance in a mixture keeps its identity
• You can physically separate them

• They also contain elements, compounds, or both
• And they can be formed using any ratio of
• components

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Mixtures may be homogeneous orheterogeneous

• The prefix homo indicates the same
• Homogeneous mixtures have the same appearance and
  properties throughout the mixture
• The prefix hetero indicates difference
• Heterogeneous mixtures consist of visibly
  different substances

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Types of Mixtures

• There are THREE types of mixtures
• Solutions
• Suspensions
• Colloids

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Solutions

• A solution is a mixture that appears to be a
  single substance, but it is actually composed of
  2 or more substances that are distributed evenly
  amongst each other.
• SOLUTIONS ARE HOMOGENEOUS

sugar Kool-Aid powder are dissolved in water
salt is dissolved in water
carbon dioxide is dissolved in water
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Suspensions

• A suspension is a mixture in which particles of a
  material are dispersed throughout a liquid or
  gas, but are large enough that they settle out.
• SUSPENSIONS ARE HETEROGENEOUS

That water is disgusting!
Italian dressing
muddy water
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Colloids

• A colloid is a mixture in which the particles are
  dispersed throughout but are not heavy enough to
  settle out.
• COLLOIDS ARE HOMOGENEOUS

Colloids have properties of both solutions
suspensions.
milk
mayonnaise
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Comparing Elements, Compounds Mixtures
Elements Compounds Mixtures
What are they made up of?
Can they be broken down? If yes, how?
Do they keep or lose their original properties?
Draw what the particles look like.
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Identify the following with as many terms as apply

1. Table salt
2. Salad
3. Mayonnaise
4. Italian dressing
5. Pepsi
6. Oxygen
7. Hydrogen
8. Water

Mixture Element Compound Suspension Colloid Soluti
on Homogeneous Heterogeneous