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) √2 a
(2)a/ √2
(3) 2a
(4) 2√2a​

Answer 1

hey! friend....

here is ur answer

In FCC, one of the face is like

,

2a^2=16r^2

⇒r^2=1/8a^2

⇒r=1/2√2a

Distance of closest approach =2r=a√2

hope it helps u

Mark me as BRAINLEST...