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  3. 10th Class
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10th Class Science Sample Paper Science Olympiad Model Test Paper-11

  • question_answer
    The electronic configuration of an element X is as follows: Which one of the following options is incorrect?

    A) Group number of element X in periodic table is 6

    B) Period number of element X in periodic table is 3

    C) Number of valence electrons in one atom of element X is 6

    D) Valency of element X is 2

    E) None of these

    Correct Answer: A

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