The crystal structure adopted by iron is shown below. The distance between the nearest iron atoms is `:`

Metallic potassium (atomi mass = 39) has a body centred crystal structure. In the unit cell of this crystal, the distance between two nearest neighbour is 4.52Å. The density of potassium (in kg*m^(-3) ) is-

Iron crystallizes in several forms. At 1185 K, the body centred cubic alpha form of iron changes to the face centred cubic gamma form of iron. Assuming that the distance between the nearest neighbours is the same in two forms at the transition temperature, calculate the ratio of the density of alpha form to that of gamma form at the transistion temperature.

Assertiion : X - rays are used for studying the structure of crystals. Reason : The distance between the atoms of crystals is of the order of wavelength of X - rays.

The arrangement in an ideal crystal AB and a defect structured crystal is shown below. The illustrates the example of

Iron crystallizes in several forms. At 1185 K , the body centred cubic alpha - form of iron changes to the face centred cubic gamma - form of iron. Assuming that the distance betweem the nearest neighbours is the same in two forms at the transition temperature, calcuate the ratio of the density of alpha - form to that of gamma - form at the transition temperature.

Nickel crystallises in a cubic close-packed structure. In this structure, the distance between two nearest neighbours is 250pm. If the atomic mass of nickel is 58.7amu, then calculate the density of nickel crystal.

Differentiate between cast iron and pig iron.

Platinum crystallize in a face-centred cubic crystal with a unite cell length a. the distance between nearest neighbours is:

Platinum crystallize in a face-centred cubic crystal with a unite cell length a. the distance between nearest neighbours is: