Solid State - Result Question 24
####24. The coordination number of a metal crystallising in a hexagonal close-packed structure is
(1999, 2M)
(a) 12
(b) 4
(c) 8
(d) 6
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Answer:
Correct Answer: 24. (a)
Solution:
- 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.
