A close packing consists of a base of spheres, followed by a second layer where each sphere rests in the hollow at the junction of four spheres below it and the third layer then rests on these in an a

Question

A close packing consists of a base of spheres, followed by a second layer where each sphere rests in the hollow at the junction of four spheres below it and the third layer then rests on these in an arrangement which corresponds exactly to that in the first layer. This packing is known as

Prashant Kotian · Accepted Answer

Correct answer: D. Placing spheres in the hollows of a square close-packed base layer (where each sphere touches 4 spheres) in an ABAB... sequence describes Body-Centred Cubic (BCC) packing. Therefore, the answer is (d).

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