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Identical spheres are undergoing two-dim...

Identical spheres are undergoing two-dimensional packing in square close packing and hexagonal close packing. Which is correct regarding the spheres ?

A

The ratio of coordination number of a sphere in first case to that in second case is 2:3.

B

Packing in second case is more effective.

C

Packing in first case is more effective.

D

The stacking of layer of first type produces simple cubic structure.

Text Solution

Verified by Experts

The correct Answer is:
A, B, D
In square close packing, CN=4 whereas in hcp, CN(2D)=6. so, the ratio is 2:3.
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