Question

Modern periodic table is based on atomic number of the elements. The significance of atomic number was proved by the experiment of ________
A) Moseley's work on X-ray spectra
B) Bragg's work on X-ray diffraction
C) Mulliken's oil drop experiment
D) Discovery of X-ray by Roentgen

Answer 1

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A) Moseley's work on X-ray spectra

Answer 2

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