Question

why was dobereiner's triad discarded

Answer 1

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Answer 2

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here is answer

Dobereiner's traids

when elements are arranged in order of increasing atomic masses group of three elements( known as traits) having similar chemical properties are obtained.

the atomic mass of middle element of traids is equal to the arithmetic mean of other two elements.

limitations.

1. it failed to arrange all the then known elements in the form of traids.

2. dobereiner's code identify only three traids from the then known elements

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