Explanation:
1.Halogen elements have different electro-negativity.
“The binary compounds formed by halogens amongst themselves are known as Inter-halogen compounds”.
2.The inter-halogen compounds may be regarded as the halide of the more
electronegative halogen.
Thus, since the electro positive character of halogens is
in the order F < Cl < Br < I
3. Since F has the least electropositive character, amongst inter-halogen compounds
4. Inter-halogens can be grouped into four categories: AB, AB3, AB5, and AB7. Here
A halogen atom is more electropositive and larger in size than B halogen atom.
5. The oxidation state of atom A in AB, AB3, AB5, and AB7 molecules is equal to
+1, +3, +5 and +7 respectively.
6 .As the ratio between the radii of A and B atoms increases, the number of halogen
atoms per molecule increases.
