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Question

Zn converts its molten state to its solid state. If it has hcp structure, then find out number of nearest atoms.

A
6
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B
8
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C
12
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D
4
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Solution

The correct option is D 12
In hcp structure, the coordination number is 12. Since Zn is in hcp structure, the number of nearest neighbours is 12, six are in the plane, 3 above the plane and 3 below the plane.

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