Solid State Question 290
Question: Copper crystallises in fee with a unit length of 361pm. What is the radius of copper atom-
Options:
A) 157pm
B) 128pm
C) 108pm
D) 181pm
Show Answer
Answer:
Correct Answer: B
Solution:
[b] For fcc, $ r=\frac{\sqrt{2}a}{4}=\frac{a}{2\sqrt{2}}=0.3535a $ given $ a=361pm $
$ r=0.3535\times 361=128pm $
BETA
