Chapter 5: Periodic Classifications of Elements

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Periodic Classifications of Elements


Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.


Dobereiner arranged elements in the form of triads. These triads also exist in the columns of Newlands’Octaves. For example,  Doberiener gave a triad of lithium, sodium, and potassium. These three elements are present in the same column of the classification done by Newland.

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