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.