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

Solution: Dobereiner’s triads did exist in the columns of Newlands’ Octaves; For example, the elements

Lithium (Li), Potassium (K) and Sodium (Na) constitute a Dobereiner’s Triad but are also found in the second column of Newland’s Octaves.

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