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Matter that is made up of only one kind of atom

All compounds are molecules, but not all molecules are compounds. The basic unit of matter. Two or more kinds of different atoms that are bonded together. Two or more kinds of atoms that are bonded together. Matter that is made up of only one kind of atom.

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Matter that is made up of only one kind of atom

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  1. All compounds are molecules, but not all molecules are compounds. The basic unit of matter Two or more kinds of different atoms that are bonded together Two or more kinds of atoms that are bonded together Matter that is made up of only one kind of atom

  2. Color, smell, boiling point, melting point, infra-red spectrum, magnetic, viscosity, density, etc… Heat of combustion, reactivity with water, PH, etc…

  3. MATTER yes no Can it be physically separated? MIXTURE PURE SUBSTANCE yes no yes no Are the parts of the mixture hard to tell apart? Can it be chemically broken down into smaller pieces? Homogeneous Mixture (solution) Heterogeneous Mixture Compound Element

  4. MATTER yes no Can it be physically separated? MIXTURE PURE SUBSTANCE yes no yes no Are the parts of the mixture hard to tell apart? Can it be chemically broken down into smaller pieces? Homogeneous Mixture (solution) Heterogeneous Mixture Compound Element Colloids Suspensions

  5. Pure Substances Element • composed of one kind of atom • EXAMPLE: copper wire, aluminum foil

  6. Pure Substances Compound • composed of 2 or more atoms bonded together • properties differ from those of individual atoms • EXAMPLE: table salt (NaCl) Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem

  7. Mixtures Combination of two or more pure substances that are not bonded together. Heterogeneous Homogeneous

  8. Mixtures Solution • homogeneous • very small particles • particles don’t settle • EXAMPLE: rubbing alcohol

  9. Mixtures Heterogeneous mixture • Medium to very large particles • relatively easy to separate • EXAMPLE: candy

  10. Mixtures Colloid • heterogeneous • medium-sized particles • particles don’t settle • EXAMPLE: milk

  11. Mixtures Suspension • heterogeneous • large and small particles • particles settle • EXAMPLE: fresh-squeezed lemonade

  12. Practice Time… Examples: • graphite • pepper • sugar • paint • juice element heterogeneous mixture compound heterogeneous mixture homogeneous mixture (solution)

  13. More practice… Examples: • mayonnaise • muddy water • fog • saltwater • Salad dressing colloid suspension colloid solution suspension

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