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Identical spheres are undergoing two-dim...

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

A

The ratio of coordination number for 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 on first type packing produces simple cubic structure.

Text Solution

Verified by Experts

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