Classification of Matter The substance of which all physical objects are made.
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Transcript of Classification of Matter The substance of which all physical objects are made.
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Classification of Matter
The substance of which all physical objects are made
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Pure Substances
Pure substances are either elements or compounds
Cannot be broken down into simpler components
Element Compound
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Elements
When all the atoms in a substance are alike
There are 90 elements found in nature
More than 20 others have been made in labs
Here are some you may recognize
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Oxygen, O2
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Mercury, Hg
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Compounds
When two or more elements combine
Have a fixed proportion
ex. Na(s) + Cl(g) NaCl(s) table salt
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Compound or Element?
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Mixtures
Material made up of two or more substances that can be separated
Review: What is a substance?- an element or compound in its simplest form
Here are just a few examples;
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PIZZA!!!!!!
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COOKIES!!!!!
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Heterogeneous v. Homogeneous
Heterogeneous - a mixture which different materials can be easily
distinguishedEx. Granite, concrete, PIZZA!!!!!!!
Homogeneous- a mixture containing two or more substances blended evenly throughoute
Ex. Soft drinks, Vinegar, Coffee
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What is a Solution?
A solution is…..
• A homogeneous mixture of particles,
• A mixture that remains uniformly mixed,
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Colloids
Types of mixtures that never settle
Contain larger particles than solutions
Ex. Glue, Paint, Fog, Smoke, etc…
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Suspensions
A heterogeneous mixture containing a liquid in which visible particles settle
They are neither solutions nor colloids
Ex. Muddy pond water
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Text Reference
• Glencoe Physical Science, Teacher Edition 2002, Glencoe/McGraw-Hill. Columbus OH. Pg. 518-524
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