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General Chemistry (Hardness)

  1. Apr 26, 2009 #1
    1. The problem statement, all variables and given/known data
    Which of the following is expected to have the greatest hardness?
    NaF
    NaI
    MgF2
    MgI2
    CaI2

    3. The attempt at a solution
    I can not seem to find what affects the hardness of them, only how to calculate it after you have the data from experiments via google. I know the answer is MgF2 I do not know how though :/. Any help as to what direction to look would be tremendously helpful.
     
  2. jcsd
  3. Apr 26, 2009 #2

    Borek

    User Avatar

    Staff: Mentor

    Think in terms of coulomb forces - charges and distances.
     
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