The CORRECT statement(s) for cubic close packed (ccp) three dimensional structure is (are)
The number of the nearest neighbours of an atom present in the topmost layers is 12
The efficiency of atom packing is 74%
The number of octahedral and tetrahedral voids per atom are 1 and 2, respectively
The unit cell edge length is 22 times the radius of the atom
Packing fraction =Vol.ofatomVol.of unit cell×100 =4×43πr3a3×100 =4×43πr322r3×100 =74%Total no.of octahedral and tetrahedral voids 4 and 8 respectively.