(C) Due to the larger size of the iodine atom,it can accommodate up to seven small fluorine atoms around it. In contrast,due to the smaller sizes of c

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that the larger iodine atom can accommodate more number of smaller fluorine atoms around it

(C) Due to the larger size of the iodine atom,it can accommodate up to seven small fluorine atoms around it. In contrast,due to the smaller sizes of chlorine and bromine atoms,they cannot accommodate seven fluorine atoms. Thus,the steric factor dominates in the case of chlorine and bromine.

Class 12 Chemistry p-Block Elements (Class 12)Halogen family

Only iodine forms hepta-fluoride $IF_7$,but chlorine and bromine give penta-fluorides. The reason for this is:

A
low electron affinity of iodine
B
unusual pentagonal bipyramidal structure of $IF_7$
C
that the larger iodine atom can accommodate more number of smaller fluorine atoms around it
D
low chemical reactivity of $IF_7$