Question

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

Answer 1

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Döbereiner’s triads did exist in the columns of Newlands’ Octaves; For example, the elementsLithium (Li), Potassium (K) and Sodium (Na) constitute a Dobereiner’s Triad but are also found in the second column of Newland’s Octaves.

Answer 2

Answer :

Yes, Döbereiner's triads also existed in Newland's octaves. For example :

• $\sf \underbrace{Li, \: Na, \: K}$
• $\sf \underbrace{Be, \: Mg, \: Ca}$