Question

In BCC, the distance between two nearest atoms will be

• A. $\sqrt 3$a
• B. $\frac{\sqrt 3}{2}$a
• C. $\frac{\sqrt 3}{4}$a
• D. $\frac{a}{2}$

Answer 1

Answer: (B)

$\frac{\sqrt 3}{2}$a

Answer 2

The correct option is (B): $\frac{\sqrt 3}{2}$a
In BCC, there will be atoms at the body centre and at corners. So the distance between two nearest atoms is nothing but distance between point A and O
AO=$\frac{AF}{2}$= $\frac{\sqrt 3}{2}$a.