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10th Class Science Sample Paper Science Olympiad Model Test Paper-7

  • question_answer
    The electronic configurations of three elements X, Y and Z are \[X-2,\]8; \[Y-2,\] 8, 7 and \[Z-2,\] 8, 2. Which of the following is correct?

    A) X is a metal

    B) Y is a metal

    C) Z is a non-metal

    D) Y is a non-metal and Z is a metal

    E) None of these

    Correct Answer: D

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