Question

explain about the ionic character of metal halides of elements of group 17 ? exaplain in details their trends?

Answer 1

The ionic character of metal halides decrease in the order as follows :

M-F > M-Cl > M-Br > M-I

The decrease in ionic character is in the order because of the increase in size of the halogen atom. As the size of an anion increases the polarizability increases which causes decrease in ionic character and increase in covalent character.