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5 Written questions

4 Multiple choice questions

  1. 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).
  2. a liquid capable of dissolving (uniformly dispersing) other substances in itself.
  3. a subatomic particle that is found in the nuclei of atoms, bears no charge, and has a mass approximately equal to that of a proton.
  4. a chemical bond formed by the electrical attraction between positively and negatively charged ions.

4 True/False questions

  1. protona 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. pH scalea particle composed of one or more atoms held together by chemical bonds; the smallest particle of a compound that displays all the properties of that compound.

          

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

          

  4. 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.

          

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