The order for the extent of orbital overlap is I-F < Br-F < Cl-F < F-F because the extent of orbital overlap is inversely proportional to the distance between atoms

The order for the extent of orbital overlap is Cl-F < F-F < Br-F < I-F because the extent of orbital overlap is inversely proportional to the distance between atoms

The order for the extent of orbital overlap is F-F < Cl-F < I-F < Br-F because the extent of orbital overlap is directly proportional to the distance between atoms

The order for the extent of orbital overlap is F-F < Cl-F < Br-F < I-F because the extent of orbital overlap is directly proportional to the distance between atoms