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Periodic Classification Of Elements

Question 1:

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

Answer:

Only one triad of Dobereiner’s triads exists in the columns of Newlands’ octaves. The triad formed by the elements Li, Na, and K of Dobereiner’s triads also occurred in the columns of Newlands’ octaves.

Dobereiner’s triads

Li

Ca

Cl

Na

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