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  3. 10th Class
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10th Class Science Sample Paper Science Olympiad Model Test Paper-20

  • question_answer
    In which of the following groups an element is placed in the modern periodic table having one valence electron?

    A) Group 1

    B) Group 2

    C) Group 13

    D)  Group 17

    E)  None of these

    Correct Answer: A

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