" Question "|" In a hep arrangement in three dimensions,the overall coordination number of each sphere is "

In hcp arrangment in three dimensions, the overall coordination number of each sphere is

Expalin ABAB type arrangement in three dimensions.

In a cubic close packing of spheres in there dimensions the coordination number of each sphere is:

When over a two-dimensional square packing same layers are kept in the way so that the centers are alligned in all three dimensions, coordination number of each sphere is

Whenever two-demiensional square packing same layers are kept in the way so that the centres are aligned in all three dimensation, coordination numberof each sphere is

Whenever two-demiensional square packing same layers are kept in the way so that the centres are aligned in all three dimensation, coordination numberof each sphere is