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5 Written questions

4 Multiple choice questions

  1. the weak attraction between a hydrogen atom that bears a partial positive charge (due to polar covalent bonding with another atom) and another atom, normally oxygen or nitrogen, that bears a partial negative charge; hydrogen bonds may form between atoms of a single molecule or of different molecules.
  2. a 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.
  3. 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).
  4. a region within which electrons orbit that corresponds to a fixed energy level at a given distance from the atomic nucleus of an atom.

4 True/False questions

  1. 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.


  2. solventa liquid capable of dissolving (uniformly dispersing) other substances in itself.


  3. Ionic Bonda chemical bond formed by the electrical attraction between positively and negatively charged ions.


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


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