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    Question

    Modern periodic table has ______ groups and ______

    periods.
    A 12, 6 Correct Answer Incorrect Answer
    B 15, 8 Correct Answer Incorrect Answer
    C 20, 10 Correct Answer Incorrect Answer
    D 18, 7 Correct Answer Incorrect Answer

    Solution

    Modern Periodic Table has 18 groups and 7 periods.

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