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In 1817 Johann Dobereiner noticed that the atomic weight of strontium fell midway between the weights of calcium and barium, elements possessing similar chemical properties.
In 1817 Johann Dobereiner noticed that the atomic weight of strontium fell midway between the weights of calcium and barium, elements possessing similar chemical properties.
Project Gutenberg Etext of Egmont, by Johann Wolfgang Von Goethe #2 in our series by Johann Wolfgang Von Goethe Copyright laws are changing all over the world, be sure to check the copyright laws for ...
According to Van Spronsen, the first observation of a relationship betwwen the atomic weights (equivalent weight) of elements was made by Johann Wolfgang Dobereiner, of the University of Jena.
These authors include Friedrich Wöhler, Justus von Liebig, Bernhard Tollens, A.W. Hoffman, Friedrich Mohr, Johann Dobereiner, Heinrich Rose, James F.W. Johnston, and Albrecht Thaer.
· Johann Dobereiner – first chemist to recognize patterns; found several groups of three elements that have similar properties;
· Johann Dobereiner – first chemist to recognize patterns; found several groups of three elements that have similar properties;
Law of Triads In 1817 Johann Dobereiner noticed that the atomic weight of strontium fell midway between the weights of calcium and barium, two elements that possessed similar chemical properties.
Experiments by Johann Dobereiner combined ferric oxalate with platinum chloride to form the precipitated of platinum metal, this becoming the basis of the platinotype process.
Johann Dobereiner (1780-1849)
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