classification of matter slides

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Classification of Matter

Matter: has mass, occupies space

Pure substances

• Only 1 substance present

• Definite and constant

composition

• Same properties under

same conditions (ex: bp,

mp)

• Elements or compounds

Mixtures

• Physical combimation

• Varying composition and

properties

• Homogeneous – 1 phase

– Mixed on particle level – not

groups

• Heterogeneous – 2 or more

phases

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ExamplesOf elements

Allotropes

C

O

P

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Heme – hemoglobin example

CO2 bound to protein chain – doesn’t directly compete with O2

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All living things are heterogeneous

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Molecular

Substances

Dissolve as

Molecules

Molecular

Substances

Are composed

Of non-metals

Ionic substances

Are composed of

Ions

Often a metal + non-metal

Or poly atomic ion

NaCl Na2SO4

Dissolve as individual ions

Electrolytes

Recurrent theme!!!

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Classification of matter