Question

What are the demerits of newland law of octave and dobereiner triads??​

Answer 1

Answer:

The drawbacks of Newland's law of octaves are as follows: There was no proper place for hydrogen. Transition elements were not considered for octaves.

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Newland stated that no elements would be discovered in future but in future other elements were discovered.

Newland's law of octaves was applicable only to calcium.

Drawbacks 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 .