The Coordination Number of ccp is ____

Answer: 12

The third layer spheres are not aligned with those of the first or second layers in cubic tight packing. 

So, if the first layer is ‘A,’ the second layer is ‘B,’ and the third layer is ‘C,’ the exact layer pattern can be expressed as ABCABC. 

A cubic close-packed (ccp) or face-centered cubic (fcc) structure is the name given to this crystal structure.

Cubic Close Packing has a coordination number of 12.