Question

Edge length of unit cell of chromium metal is 287 pm with bcc arrangement. The atomic radius is of the order

• A. $124.27pm$
• B. 287 pm
• C. 574 pm
• D. $143.5pm$

Answer 1

Answer: (A)

$124.27pm$

Answer 2

In bcc lattice, $r = \frac{\sqrt{3}}{4}ar = \frac{1.732 \times 287}{4} = 124.27pm$