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    Question

    Identify an anomaly element that belongs to both group 1

    and group 17.
    A Oxygen Correct Answer Incorrect Answer
    B Hydrogen Correct Answer Incorrect Answer
    C Chlorine Correct Answer Incorrect Answer
    D Nitrogen Correct Answer Incorrect Answer

    Solution

    Hydrogen combines with halogens so it can be placed in group 1 of the alkali metals. It also exists as a diatomic molecule and forms ionic compounds with metals so it can be placed in the halogen group (17) also.

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