CBSE Class 12-science Answered
A solid A+B- has NaCl close packed structure. The radius of the cation when the radius of the anion is 250pm is _____________ ?
Asked by SURESH C c | 31 Aug, 2012, 10:35: PM
Expert Answer
Limiting radius ratio = (Size of Cation ,A+)/(Size of anion B-)
In NaCl
For a cation to fit exactly an octahedral hole
r+/r-=0.414
r+ = 0.414 r-
= 0.414*250
=103.5pm
So, radius of Cation is 103.5pm
Answered by | 02 Sep, 2012, 12:37: PM
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