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The CORRECT statements (s) for cubic clo...

The CORRECT statements (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 `2sqrt(2)` times the radius of the atom

Text Solution

Verified by Experts

(BCD) CCP has a packing efficiency of 74%.
The nearest neighbours in the top most layer is 9.
The number of tetrahedral and octahedral voids are 2 and 1 respectively per atom.
The edge length is `2sqrt(2)` times the radius of atom `(sqrt(2)a = 4r)`
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