Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Consider the bcc unit cells of the solid 1 and 2 with the position of atoms as shown below. The radius of atom 
is twice that of atom 
. The unit cell edge length is 
more in solid 2 than in 1 . What is the approximate packing efficiency in solid 2?
Solid 1 
Solid 2 
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
% packing efficiency 
Let radius of corner atom is 
and radius of central atom is 
So, 
Now
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