2.1 notes

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2.1 notes

  1. 1. Ch 2-1 Classifying Matter Composition means a putting together. Materials are classified as pure substances or mixtures
  2. 2. Pure Substance <ul><li>A fixed uniform composition that has the same properties throughout </li></ul>Elements <ul><li>A pure substance that cannot be broken down </li></ul><ul><li>Contains only one atom </li></ul>
  3. 3. Compounds <ul><li>Two or more element joined in fixed proportion </li></ul><ul><li>Elemental symbols Au-gold, N-nitrogen, C-carbon, H-hydrogen </li></ul>
  4. 4. Mixtures <ul><li>Composition is not fixed properties can vary </li></ul><ul><li>Heterogeneous mixture parts are noticeably different </li></ul><ul><li>Homogeneous mixture parts are evenly distributed </li></ul>
  5. 5. Solutions, Suspensions,& Colloids <ul><li>Classified by the size of the particle </li></ul><ul><li>Clear liquid= solution </li></ul><ul><li>Particles settle out=suspension </li></ul><ul><li>Opaque liquid= colloid </li></ul>

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