6
8
12
4
The correct option is (C): 12.
In the hexagonal close-packed (hcp) structure, the coordination number is 12. As zinc (Zn) adopts the hcp structure, it has 12 nearest neighbors, with six located within the same plane, and three situated above and three below that plane.
A cubic solid is made up of two elements $X$ and $Y$ Atoms of $X$ are present on every alternate corner and one at the enter of cube $Y$ is at $\frac{1}{3} td$ of the total faces The empirical formula of the compound is
List-I | List-II | ||
(A) | Hexagonal | (I) | ∝ ≠ β ≠ γ ≠ 90° |
(B) | Orthorhombic | (II) | ∝ = γ = 90°, β ≠ 90° |
(C) | Triclinic | (III) | ∝ = β = 90°, γ = 120° |
(D) | Monoclinic | (IV) | ∝ = β = γ = 90° |