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      Question

      Who conducted X-ray spectroscopic study of a large

      number of elements and showed that the frequency of X-rays emitted by an element is related to the atomic number, Z, rather than the atomic mass?
      A Dmitri Mendeleev Correct Answer Incorrect Answer
      B Johann Dobereiner Correct Answer Incorrect Answer
      C Lothar Meyer Correct Answer Incorrect Answer
      D Henry Moseley Correct Answer Incorrect Answer

      Solution

      The correct answer is D

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