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0 votes
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in Chemistry by (77.4k points)

The coordination number of a metal crystallizing in a hexagonal close-packed structure is

(A) 12 

(B) 4 

(C) 8 

(D) 6  

1 Answer

+1 vote
by (87.4k points)
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Best answer

Correct option (A) 12

Explanation:

Three consecutive layers of atoms in hexagonal close packed lattice is shown below:
Atom X is in contact of 12 like atoms, 6 from layer B and 3 from top and bottom layers A each.

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