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  • 21-09-2018
  • Biology
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Greek thinkers Contribution to the development of the periodic table?

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briana4244
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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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