A metal crystallises in a face centred cubic structure. If the edge length of the unit cell is 'a' the closest approachbetween the two atoms in the metallic crystal will be

A metal crystallises in a face centred cubic structure. If the edge le

1.	A metal crystallises in a face centred cubic structure. If the edge length of the unit cell is 'a' the closest approachbetween the two atoms in the metallic crystal will be
Answer» `sqrt2a` `a/sqrt2` 2a `2sqrt2a` Solution :For the fcc STRUCTURE, nearest NEIGHBOUR DISTANCE (d)=`a/sqrt2`.