AP and TS EAMCET Engineering 2020 Model Paper 1

A -atoms are present at the corners of a cube. So, the number of A -atoms per unit cell = 8×

1

8

=1
Similarly, B-atoms are present at face centres of a cube.
So, the number of B -atoms per unit cell
=6×

1

2

=3
Hence, the formula of compound is AB3.