In a face centred cubic lattice, atom A occupies the corner positions and atom B

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Question
In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is 1) A2B5 2) A3B2 3) A2B3 4) A3B4
Options
A. Option 1
B. Option 2
C. Option 3
D. Option 4

Correct Answer

Option 1

Explanation

$Z_{A} = \frac{8}{8}$ ; $Z_{B} = \frac{5}{2}$