(A) The iodine atom $(I)$ has $7$ valence electrons. In the $IF$ molecule,iodine forms one covalent bond with the fluorine atom $(F)$.After forming on

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(A) The iodine atom $(I)$ has $7$ valence electrons. In the $IF$ molecule,iodine forms one covalent bond with the fluorine atom $(F)$.After forming one bond,$6$ electrons remain on the iodine atom,which corresponds to $3$ lone pairs of electrons.Therefore,the number of lone pairs on the iodine atom in $IF$ is $3$.