Question

name the scientist who find out also that the atomic number of an element is more fundamental property than its atomic mass

Answer 1

H.G.J. Moseley showed by x ray analysis that atomic number is a more fundamental property of an element than atomic weight

Answer 2

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  Henry moseley was the man, who (after checking mendeleev's periodic table ) first showed that atomic number of an element is more fundamental property then, atomic mass,..

   He disagreed the statement of mendeleev,.
Which gave rise to the formation of modern periodic law,.
and modern periodic table

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