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General Chemistry (Hardness)

  • Thread starter Neophyte
  • Start date
  • #1
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Homework Statement


Which of the following is expected to have the greatest hardness?
NaF
NaI
MgF2
MgI2
CaI2

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.
 

Answers and Replies

  • #2
Borek
Mentor
28,328
2,717
Think in terms of coulomb forces - charges and distances.
 

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