Question

Explain why Dobereiner' s method of classification of elements did not hold much weightage for future classification.

Answer 1

as this method is only limited for the elements till atomic no. 40
some similar elements are put in different columns and the elements with same property in same column

Answer 2

Bcoz at that time
only 23 elements were discovered

and he only form 3 triads

it is not applicable for all elements