Published by:
CGP EDU Academic Team
Published on: August 12, 2026
The CORRECT statement(s) for cubic close packed (ccp) three dimensional structure is(are)
A
The number of the nearest neighbours of an atom present in the topmost layer is 12
B
The efficiency of atom packing is 74%
C
The number of octahedral and tetrahedral voids per atom are 1 and 2, respectively
D
The unit cell edge length is 
times the radius of the atom
times the radius of the atom
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(B, C, D)
The middle layers will have 12 nearest neighbours. The top-most layer will have 9 nearest neighbours.
, where 'a' is edge length of unit cell and 'r' is radius of atom.
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