Question

An element 'A' has face-centred cubic structure with edge length equal to 361 pm. The apparent radius of atom 'A' is -

• A. 127.6 pm
• B. 180.5 pm
• C. 160.5 pm
• D. 64 pm

Answer 1

Answer: (A)

127.6 pm

Answer 2

a $\sqrt{2}$ = 4r

r = $\frac{\sqrt{2}a}{4}$

= $\frac{1.414 \times 361}{4}$

= 127.6 pm