A) \[2.86\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[6.81\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[1.68\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[1.86\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: D
Solution :
For a body centred cubic lattice, the radius of atom is \[r=\frac{\sqrt{4}}{3}\cdot a\] \[a=4.29\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] \[\therefore \] \[r=\frac{1.732\times 4.29}{4}=1.86\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
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