Question

What is ratio of number of atom per unit cell in the bcc

and fcc?

(A) 1:2
(B) 1:3
(C) 2:3
(D) 3:2​

Answer 1

The ratio of the number of atom per unit cell in the bcc and fcc is:

(A) 1:2

- The term bcc means Body Centered Cubic unit cell.

- In it, the total no of atoms per unit cell is 2.

- The term fcc means Face Centred Cubic unit cell.

- In it, the total no of atoms per unit cell is 4.

- So, the ratio is given as:

bcc : fcc = 2 : 4 = 1 : 2