Question

Q.17 A cubic solid is made up of two elements A and B. Atoms A are present at the corners of t
cube and atoms B are at the face centres. What is the formula of the compound ?
[Pb.Board 2010)​

Answer 1

Explanation:

Since A occupies 2 corners ,

Amount of atom A in the cell is (1/8)*2 = (1/4)

Then B occupies the body centre as well as the rest 6 corners, so

Amount of atom B in the cell is (1/8)*6 + 1= 7/4

Taking the ratio between A and B we get,

A/B = (1/4)*(4/7) = 1/7

So its probably AB7.

HOPE IT HELPS....!

PLEASE FOLLOW ME.......,