Question : Who conducted an 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?
Option 1: Lothar Meyer
Option 2: Dmitri Mendeleev
Option 3: Henry Moseley
Option 4: Johann Dobereiner
Correct Answer: Henry Moseley
Solution : The correct option is Henry Moseley .
The scientist who conducted the X-ray spectroscopic study was Henry Moseley. He conducted experiments in the early 20th century that showed that the frequency of X-rays emitted by an element is directly related to its atomic number (Z) rather than its mass.
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