Classification of Matter

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Classification of Matter

• WORD Matter
• DEF anything that has mass and takes up space.

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B. Pure Substances

• Matter that is pure and always homogeneous

Two different compounds, each has a definite
composition.
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B. Pure Substances

• Element
• composed of identical atoms
• EX copper wire, aluminum foil

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ATOMS

• Atoms- Extremely small building blocks of matter
• All matter is composed of atoms
• Atoms cannot be broken down into smaller pieces
  by chemical means
• The smallest distinct units in a sample of matter
• Elements are made up the same atoms.
• Elements cannot be decomposed into other
  substances.

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B. Pure Substances

• Compound
• composed of 2 or more elements in a fixed ratio
• properties differ from those of individual
  elements
• EX table salt (NaCl)

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MOLECULES

• Molecule a combination of 2 0r more atoms (same
  or different) that are chemically bonded.
• A molecule is the smallest particle of a
  substance which exhibits the physical and
  chemical characteristics of the substance.

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Mixture

• Mixtures are two or more substance that are not
  chemically combined.
• Mixtures do not have a fixed composition
• Variable composition
• Components retain their characteristic properties

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C. Mixtures

• Physical combination of 2 or more pure substances.

Heterogeneous
Homogeneous
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C. Mixtures (solution)

• Solution
• homogeneous
• very small particles
• one substance dissolved in another

• particles dont settle
• EX rubbing alcohol

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C. Mixtures (suspension)

• Suspension
• heterogeneous
• large particles
• particles settle
• EX fresh-squeezed lemonade

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C. Mixtures (colloid)

• Colloid
• heterogeneous
• medium-sized particles
• particles dont settle but arent dissolved
• EX jello

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A. Matter Flowchart
MATTER
yes
no
Pure and homogeneous?
Homogeneous Mixture (solution)
Compound
Element
Do the particles settle out?
yes
no