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    Question

    Which of the following sequences correctly represents

    the electron affinity of the halogens?
    A F < I < Br < Cl Correct Answer Incorrect Answer
    B I < Br < F < Cl Correct Answer Incorrect Answer
    C I > Br > F > Cl Correct Answer Incorrect Answer
    D I < Br < Cl < F Correct Answer Incorrect Answer

    Solution

    Electron affinity generally increases across a period and decreases down a group due to atomic size and electron-electron repulsion in smaller atoms. Among halogens, chlorine has a higher electron affinity than fluorine due to its larger size allowing easier addition of an electron, making the order I < Br < Cl < F.

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