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A metal crystallises in a face centred cubic structure.

Question:

A metal crystallises in a face centred cubic structure. If the edge length of its unit cell is

'a', the closest approach between two atoms in metallic crystal will be :-

  1.  2a

  2. $2 \sqrt{2} a$

  3. $\sqrt{2} a$

  4. $\frac{a}{\sqrt{2}}$


Correct Option: , 4

Solution:

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