What is unit cell ? What do you understand by simple, face centred and body centred unit cells?

What do you understand by the term unit?

What do you understand by the term unit?

What do you understand by the terms : fuel-cell ?

How many types of centred unit cells exist?

The number of atoms per unit cell in a simple cube, face - centred cube and body - centred cube are respectively :

The number of atoms per unit cell in a simple cube, face - centred cube and body - centred cube are respectively :

The percentage of free space in a body centred cubic unit cell is

In a unit cell, atoms A, B, C and D are present at comers, face centres, body - centre and edge - centre respectively in a cubic unit cell. The total number of atoms present per unit cell is

Percentage of free space in cubic in a body- centred cubic unit cell is .