Solid StateHard

Question

Figure shows a cube of unit cell of CCP arrangement with face centered atoms marked 1, 2, 3.Which of the following statements is true.
      

Options

A.Atom 3 is twice as far from 1 as from 2
B.Atom 2 is equidistant from atoms 1 & 3.
C.Atom 2 is nearer to 1 than to 3.
D.All atoms lie on a right angled triangle.

Solution

d1-2 =         ; d2-3 = 
Hence d1-2 = d2-3.

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