Question

A compound formed by element "A" and "B" crystallises in a cubic structure in which A atoms are at the centre of the cube and B atoms are at the face centres. The formula of the compound is:-

Options

• AB₃

• AB

• A₃B

• A₂B₃

Answer 1

AB₃ 

Explanation:

Contribution by the atom A in the centre of the cube = 1

Contribution by the atom B at the centre of all the size faces `6 xx 1/2` = 3

∴ Formula of compound = AB₃.