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5 Written questions

5 Matching questions

  1. solvent
  2. nucleus
  3. electron
  4. pH scale
  5. element
  1. a pure substance consisting entirely of one type of atom
  2. b measures the concentration of hydrogen ions in a solution
  3. c center of the atom containing protons and neutrons
  4. d the substance in which the solute is dissolved
  5. e negatively charged particle circulating around the nucleus

5 Multiple choice questions

  1. atoms of the same element but with a different number of neutron
  2. solution with a higher concentration of hydrogen ions than water
  3. smallest unit of a compound
  4. positively charged particle of an atom
  5. substance formed by the chemical comination of two or more compounds in definite proportion

5 True/False questions

  1. adhesionan attraction between molecules of the same substance


  2. basesolution witha lower concentration of hydrogen ions than water


  3. covalent bondFormed when one or more electrons are transferred from one atom to another


  4. van der waals forcean attraction between molecules of different substances


  5. solutethe substance that is dissolved


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