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British chemist, John Newlands had the idea of arranging chemical elements in order of their relative atomic masses and he arranged his elements in columns. However, Russian chemist, Dmitri Mendeleev greatly improved on Newlands' idea and convinced other chemists to use it, so Mendeleev has been credited with the invention of the periodic tbale...but as of today we are still developing some of hte last elements....

from: "http://inventors.about.com/library/inventors/blperiodictable.htm"

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16y ago

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