Question

1. Did Dobereiner's triads also exist in the columns of Newlands' Octaves? Compare
and find out. give me answer
2.
What were the limitations of Dobereiner's classification?​

Answer 1

Answer:

1) Yes, Dobereiner's triads also exist in the columns of Newlands Octaves. For    example, the second column of Newlands classification has the elements lithium (Li), sodium (Na) and Potassium (K), which constitute a Dobereiner's triad. ... All the known elements could not be arranged in the form of triads.

2) Limitations of Dobereiner's classification of elements was that it failed to arrange all the then known elements in the form of triads of elements having similar chemical properties. His classification was not applicable to all known elements but was limited only to a few elements.