Q. Modern periodic table is based on atomic number of the elements. The significance of atomic number was proved by the experiment of ________

A) Bragg's work on X-ray diffraction

B) Moseley's work on X-ray spectra

C) Discovery of X-ray by Roentgen

D) Mulliken's oil drop experiment

✔ Correct Answer: Moseley's work on X-ray spectra

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