Question

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what were the limitations of Döbereiner's classification?
what were the limitations of Newlands' Law of Octaves?​

Answer 1

Answer:

LIMITATIONS OF DOBEREINER'S TRAIDS:

Dobereiner could find only three triads; . i.e total of 9 elements only. However the total number of elements were more than that of those encompassed in Dobereiner's Triad. Thus,Dobereiner's could not be classify most of the elements known at that time.

LIMITATIONS OF NEWLAND'S LAW:

The major limitations of Newlands' law of octaves were : (i) It was applicable to only lighter elements having atomic masses upto 40 u, i.e., upto calcium. After calcium, the first and the eighth element did not have similar properties.

Explanation:

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Answer 2

dobereiners could only able to arrange 9 elements.... after that dobereiner traides are useless ..

dobeirner said that the mass of middle element is approximately equal to the sum of first and second element but it is only applicable for 9 elements....

limitations of new lands law of octaves

new lands law of octaves only applicable upto calcium

new lands assume that only 63 elements exist in nature and no new elements could be discovered in future..

in order to fit elements in his table new lands put two elements in the same slot

noble gases were not discovered at that time but when noble gases discovered so the properties of every eighth element is no longer similar to first one...

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