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5 Written Questions

4 Multiple Choice Questions

  1. a scale, with values from 0 to 14, used for measuring the relative acidity of a solution; at pH 7 a solution is neutral, pH 0 to 7 is acidic, and pH 7 to 14 is basic; each unit on the scale represents a tenfold change in concentration.
  2. a charged atom or molecule; an atom or molecule that has either an excess of electrons (and hence is negatively charged) or has lost electrons (and is positively charged).
  3. a chemical bond formed by the electrical attraction between positively and negatively charged ions.
  4. a covalent bond with equal sharing of electrons.

4 True/False Questions

  1. neutrona subatomic particle that is found in the nuclei of atoms, bears a unit of positive charge, and has a relatively large mass, roughly equal to the mass of the neutron.

          

  2. moleculea scale, with values from 0 to 14, used for measuring the relative acidity of a solution; at pH 7 a solution is neutral, pH 0 to 7 is acidic, and pH 7 to 14 is basic; each unit on the scale represents a tenfold change in concentration.

          

  3. electron shella region within which electrons orbit that corresponds to a fixed energy level at a given distance from the atomic nucleus of an atom.

          

  4. elementa liquid capable of dissolving (uniformly dispersing) other substances in itself.

          

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