Question

$Zn$ when converted from its melted state to its solid state, it has HCP structure, then find out no. of nearest atom:-
AIPMT-2001

Answer 1

When Zinc is converted from it's melted state to solid state, it has HCP structure.
In hcp lattice,
Each sphere touches 6 spheres in its layer and 3 spheres below the layer and 3 spheres above the layer; i.e. number of nearest neighbours are 12.
$\text{Other examples are}:Mg,Cd,TiandBe$
Hence, option (c) is the correct answer.