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Classification of Matter
 

Classification of Matter

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    Classification of Matter Classification of Matter Presentation Transcript

    • CLASSIFICATION OF MATTER
    • CLASSIFICATION OF MATTER
    • PURE SUBSTANCES
      • pure substance = a substance that has constant composition and properties (contains only one kind of particle)
    • ELEMENTS
      • element = a pure substance that cannot be broken down by ordinary means.
      • eg) Any example from the periodic table
    • COMPOUNDS
      • compound = a pure substance that contains two or more different elements in a fixed proportion. The elements are chemically bonded.
    • COMPOUNDS
      • H 2 O
      NaCl C 12 H 22 O 11
    • ATOMS
      • atom = a particle in an element and the smallest unit of an element
    • MOLECULES
      • molecule = the combination of two or more atoms
    • MOLECULES
    • MIXTURES
      • mixture = a substance that contains two or more different pure substances that are NOT chemically combined
    • MIXTURES
      • Components can be separated by physical means (e.g. filtration, evaporation, distillation)
    • HOMOGENEOUS SOLUTION
      • homogeneous solution = a mixture that has “uniform” composition - i.e. one phase. The components within the solution are not identifiable with the eye.
    • SOLUTE
      • solute = the particle that is present in smaller proportions. The dissolved particle.
    • SOLVENT
      • solvent = the particle in larger proportion. The substance in which the solute is dissolved.
    • ALLOY
      • alloy = a homogeneous mixture of one or more metals
      sterling silver steel bronze silver + copper iron + carbon copper + tin + zinc
    • HETEROGENEOUS MIXTURE
      • heterogeneous mechanical mixture = a substance in which the different components are identifiable. Has two or more phases.
    • MECHANICAL MIXTURE
      • ordinary mechanical mixture = a substance in which the particles are not uniformly scattered
    • SUSPENSION
      • suspension = suspended particles can be seen with the unaided eye. If left undisturbed, gravity will cause the particles to separate.
    • EMULSION
      • emulsion = a suspension of liquids where separation of particles is prevented through the use of an emulsifying agent.
    • COLLOID
      • colloid = suspended particles cannot be seen with the unaided eye. Gravity will not cause them to separate (they appear to be homogeneous)
    • TYNDALL EFFECT
      • tyndall effect = the scattering of a beam of light caused by particles in a colloid . Allows homogeneous solutions and colloids to be distinguished.