Question

Doobereiner's limitations​

Answer 1

Answer:

Limitations of Dobereiner's classification: 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.

Explanation:

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Answer 2

people did not know where to place isoptopes

some of the elements were left out

there was no place for the elements not yet found

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