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Question
The ionic radii of A+ and B− are 0.98 × 10−10 m and 1.81 × 10−10 m. The coordination number of each ion in AB is ______.
Options
8
2
6
4
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Solution
The ionic radii of A+ and B− are 0.98 × 10−10 m and 1.81 × 10−10 m. The coordination number of each ion in AB is 6.
Explanation:
Given: Ionic radius of A+ = 0.98 × 10−10 m
Ionic radius of B− = 1.81 × 10−10 m
Formula: Radius ratio = `(rA^+)/(rB^-)`
= `(0.98 xx 10^(−10))/(1.81 xx 10^(−10))`
= 0.54 ≈ 6
∴ The coordination number of each ion in AB is 6.
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