classifying matter/mixtures

7/29/2019 Classifying Matter/Mixtures

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Classifying MatterA Day: 9/3/13

B Day: 9/4/13


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Matter

Anything that has mass and takes up space

Anything made from atoms

Examples:

Molecules

CellsPeople

Air

Water


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Classifying Mixtures Flow Chart


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Elements Elements are pure substance that cannot be

separated into simpler substance byphysical or chemical means.

Pure substance

Every atom is the same

Elements can be found on the periodic table!

Element

Single Atom

Cannot be separated by

chemical or physical

processes


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Compounds Pure substance composed of two or more

d ifferent elementsjoined by chemical bonds.

Made ofelements in a specific ratio

Has a chemical formula

Can only be separated by

chemical means only, not physically

Compound

Single Molecule

Made of more than one type of

atom bonded together


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Mixtures

Combining two or more pure substances

Substances held together by physicalforces, notchemical

No chemical change takes place .

They can be separated physically.


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Homogeneous Mixtures

Homogeneous mixtures are also known as solutions.

Visually the solution looks uniform throughout.

The different particles cannotbe seen.

This solution remains constant and does notseparate out.


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Heterogeneous Mixtures

TWO TYPES:

Colloids Particles may be big enough to see

under a microscope but will stay suspended overtime.

Suspensions Have the largest of all dispersedparticles. They are visible to the eye and will settle

out over time.


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Mixtures vs. CompoundsMIXTURE COMPOUND

COMPOSITION You can vary the amount

of each substance in a

mixture

Cannot change the

amount of each element

in a compound

CHEMICALLY

JOINED?

Not chemically joined Chemically joined

PROPERTIES Each substance involved

keeps its own properties

Compound has

properties different from

each element

SEPARATION Easily separated Separated only using

chemical reactions

EXAMPLES Sea water, kool-aid Water


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Check For Understanding

What are the two types of pure

substances?


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Answer

Elements

Compounds


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Pure Substance orMixture?

ROCKS


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Answer

MIXTURE


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Copper


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Answer

Pure Substance


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Pure substance ormixture?

Jelly Beans


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Answer

Mixture


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Table Sugar


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Answer

Pure Substance

(Compound)


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Salt


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Answer

Pure Substance

(Compound NaCl)


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Tea


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Answer

Mixture


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Pure Substance ormixture?

Water


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Aluminum


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Answer

Pure Substance

(Element)


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Answer

Mixture


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Guided Practice

A B C D E

Element Compound

Mixture of elements

Mixture of compound

Mixture of elements and compound

classifying matter/mixtures

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