AIEEE 2002 Chemistry Solved Paper

In bcc- points are at corners and one in the center of the unit cell.
Number of atoms per unit cell =8×‌

1

8

+1=2.
In fcc - points are at the corners and also centre of the six faces of each cell.
Number of atoms per unit cell =8×‌

1

8

+6×‌

1

2

=4.