A compound formed by elements A and B has cubic structure in which A atoms are at the corners of the cube and B atoms are at the face centres. The formula of the compound will be ___________. (a) A4B3 (b) A2B (c) AB3 (d) A2B3

AB3

Number of atoms A present per unit cell = (1/8) x 8

= 1

Number of atoms B present per unit cell = 6 x (1/2)

= 3

So, ratio of A:B = 1:3

Therefore, the formula is AB3

So, the correct option is (c)

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