OpenCampus1998 OpenCampus1998

21-09-2018
Biology

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Greek thinkers Contribution to the development of the periodic table?

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21-09-2018

A German scientist called Johann Dobereiner put forward his law of triads in 1817. Each of Dobereiner's triads was a group of three elements. The appearance and reactions of the elements in a triad were similar to each other

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