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5 Written Questions

5 Matching Questions

  1. van der waals force
  2. solution
  3. base
  4. isotope
  5. molecule
  1. a mixture where all components are even distributed
  2. b solution witha lower concentration of hydrogen ions than water
  3. c atoms of the same element but with a different number of neutron
  4. d smallest unit of a compound
  5. e force of attraction between large molecules

5 Multiple Choice Questions

  1. pure substance consisting entirely of one type of atom
  2. an attraction between molecules of different substances
  3. center of the atom containing protons and neutrons
  4. the substance that is dissolved
  5. negatively charged particle circulating around the nucleus

5 True/False Questions

  1. buffera weak acid or weak base that prevents sudden changes in pH


  2. neutronnegatively charged particle circulating around the nucleus


  3. mixturetwo or more elements or compounds that are physically mixed but not chemically combined


  4. compoundsubstance formed by the chemical comination of two or more compounds in definite proportion


  5. cohesionan attraction between molecules of the same substance


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