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 neighbours of an atom present in the topmost layer is 12 (SST-CCP_M(P))
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)
For any atom in top most layer, coordination number is not 12 since there is no layer above top most layer
Fact
Fact
a = 4R
So a = 2 
R
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