Question

If the radius of the anion in an ionic solid is 200 pm, what would be the radius of the cation that fits exactly into a cubic hole

Answer 1

Answer:

Radius ratio for cubic anion packing is 0.73

Radius ratio is given by = Radius cation +

Radius anion

0.73= Radius cation

Radius cation = 0.73 x 200

Radius cation = 146 pm is the answer

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Answer 2

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