Question

If three elements A, B and C crystallize in a cubic structure with atoms A at corners, B at the body centre and C at the face crntres, the formula of the compound will be
A. ABC
B. `ABC_(2)`
C. `ABC_(3)`
D. `AB_(2)C`

Answer 1

Correct Answer - B
Atoms A per unit cell `=8xx(1)/(8)=1`
Atomc B per unit cell = 1
Atomc C per unit cell `=6xx(1)/(8)=3`
Ratio `A:BC=1:1:3` . Hence,formula is `ABC_(3)` .