A) \[4.8\,{AA}\]
B) \[4.3\,{AA}\]
C) \[3.9\,{AA}\]
D) \[23.3\,{AA}\]
Correct Answer: B
Solution :
For bcc packing, distance between two nearest atoms \[d=2r=2\,\left( \frac{\sqrt{3}\,a}{4} \right)\] Þ Lattice constant \[a=\frac{2d}{\sqrt{3}}=\frac{2\times 3.7}{\sqrt{3}}=4.3{AA}\]
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