In hexagonal close packing of shpere in three dimesions, which of the following statements is correct.

In hexagonal close packing of spherer in three dimensions.

In hexagonal close packing of spherer in three dimensions.

In hexagonal close packing of spherer in three dimensions.

Explain hexagonal close packing in three dimensions.

Between square and hexagonal close packing in two dimensions, which one represents the most effective packing, and why?

Assertion : In hexagonal close packing voids are between three touching spheres whose centres lie at the corners of an equilateral triangle. Reason : In hexagonal close packing voids are called square voids.

Assertion : In hexagonal close packing vaccant space are between three touching spheres whose centes lie at the coeners of an equilateral traingle Reason :In hexagonal close packing voids are called voids are called square voids

Hexagonal close packing is found in crystal lattice of