Question

limitations of dobereiner triads​

Answer 1

Answer:

Dobereiner's law of triads states that, the atomic mass of the middle element of a triad is the arithmetic mean of the atomic masses of the other two elements. Example: In the triad of lithium, sodium and potassium. ... All the known elements could not be arranged in the form of triads.

It was useless because not all elements could fit into this property. The law of triads was rejected because Doberiener failed to arrange all the known elements in form of triads.Besides,The law did not fully apply within the same family.

The limitation of Dobereiner's classification of elements: Dobereiner could identify only three triads from the elements known at that time. So, all the elements could not be arragneged in the form of triads on the basis of their similar chemical properties.

Explanation:

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Answer 2

Limitations of Dobereiner's Traid.

1) Dobereiner failed to arrange all the then known elements in the form of triads.

2) The law did not fully apply even within the same group.

Hope it helps you.