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    Question

    Which of the following is not a merit of Mendeleev’s Periodic Table? 

    A He predicted the properties of some undiscovered elements and left gaps for them Correct Answer Incorrect Answer
    B He framed the periodic table with vertical and horizontal columns and gave shape to it Correct Answer Incorrect Answer
    C He gave separate places to isotopes in his periodic table Correct Answer Incorrect Answer
    D It helped in correcting the atomic masses of some of the elements Correct Answer Incorrect Answer

    Solution

    The correct answer is C

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