Final answer:
All the options given, Chloride, Bromide, Iodide, and Fluoride, are indeed halide ions. Therefore, there is no correct answer to the question as it is asked because none of the options is NOT a halide ion.
Step-by-step explanation:
The student asked which of the following is NOT a halide ion: (A) Chloride (Cl⁻), (B) Bromide (Br⁻), (C) Iodide (I⁻), (D) Fluoride (F⁻). Halide ions are the negatively charged ions of halogens, which include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Since all the given options are ions of halogens and thus halide ions, the question does not have a correct answer as stated; none of the given options is NOT a halide ion.