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A compound formed by elements A and B cr...

A compound formed by elements A and B crystallizes in the cubic arrangement in which atoms A are at the corners of the cube and atoms B at the face centres. What is the formula of the compound?

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A atoms from 8 corners of a cube = `1/8xx8`=1
B atoms from 6 face centres in unit cell = `1/2xx6`=3
Hence, formula of compound = `AB_3`.
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