Question

Which of the following does not represent radius of the atoms correctly?

(i) Simply cubic cell : Radius$= \frac{a}{2}$

(ii) Face centred cubic cell : Radius $= \frac{a}{3\sqrt{3}}$

(iii) Body centred cubic cell : Radius $- \frac{\sqrt{3}}{4}a$

• A. (i)
• B. (iii)
• C. (ii)
• D. (i) and (ii)

Answer 1

Answer: (C)

(ii)

Answer 2

For fcc, radius of the atom $= \frac{a}{2\sqrt{2}}$