Answer:
Ionicity and Covalency both are relative terms
Step-by-step explanation:
So ionicity or covalency of a compound is always checked with respect to another compound.
According to Fajan's rule which tells whether the chemical bond is covalent or iconic, AgBr is more covalent than AgCl because polarizability of Br- ion is greater than Cl- ion. Similarly, covalency of AgF is less than AgBr and ionocity of AgBr is greater than that of AgI compund.