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If a stands for the edge length of a cub...

If a stands for the edge length of a cubic systems simple cubic, body centred and face centred cubic, then ratio of radii of spheres in these systems are.

A

`sqrt3/2 overset(-)a: sqrt2/2 a`

B

`a:sqrt3a:sqrt2a`

C

`a/2: sqrt3/4 a: a/(2sqrt2)`

D

`a/2:sqrt3a:1/2sqrt2a`

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If 'a' stands for the edge length of the cubic systems : simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively,

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Knowledge Check

  • In a face centred cubic cell, an atom at the face centre is shared by:

    A
    4 unit cell
    B
    2 unit cells
    C
    1 unit cells
    D
    6 unit cells

  • The number of atoms in a face centred cubic unit cell is:

    A
    4
    B
    3
    C
    2
    D
    1

  • In a body centred cubic cell, an atom at the body of centre is shared by:

    A
    1 unit cell
    B
    2 unit cells
    C
    3 unit cells
    D
    4 unit cells

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    How many particles are there in a body-centred and a face-centred cubic unit cell?

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