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    Question

    According to the octet rule, which group of elements

    tends to gain electrons to achieve a stable electron configuration? 
    A Alkali metals (Group 1) Correct Answer Incorrect Answer
    B Alkaline earth metals (Group 2) Correct Answer Incorrect Answer
    C Halogens (Group 17) Correct Answer Incorrect Answer
    D Noble gases (Group 18) Correct Answer Incorrect Answer

    Solution

    Halogens, such as chlorine and fluorine, have 7 valence electrons and tend to gain one electron to achieve a stable octet.

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