A compound formed by elements A and B crystallizes in cubic structure where A atoms are at the corners of a cube and B atoms are at the face center . What is the formula of the compound ?

Options

A. `AB_3`
B. `A_2B`
C. `AB_2`
D. `A_2B_3`

Answer

A

Explanation

No. of A atoms per unit cell = 8 (at corners) `xx 1/8`
No. of 8 atoms per unit cell = 6 (at the face centre) `xx 1/2 = 3`
Formula `AB_3`.