Ina cubic unit cell, seven of the eight corners are occupied by atoms A and centres of faces are occupied by atoms B. The general formula of the compound is:

Options

A. `A_(7)B_(6)`
B. `A_(7)B_(12)`
C. `A_(7)B_(24)`
D. `A_(24)B_(7)`.

Answer

C

Explanation

Effective no. of atoms of `A=1-(1)/(8) implies (7)/(8)` Effective no. of atoms of `B=6xx(1)/(2)implies 3`
`A_(7//8)B_(3)` or general formula is `A_(7)B_(24)`.