Question

what do you mean by doberiners traids

Answer 1

Hey !! your answer is -

What are Dobereiner’s triads?
According to Dobereiner, all elements occurred in groups of three, when arranged in increasing order of atomic masses. He referred to these groups as triads. In a traid the elements had similar chemical properties. Traids of the Dobereiners classification: Traid1:
Element Atomic mass
Lithium (Li) 7
Sodium (Na) 23
Potassium (K) 39

Answer 2

In a triad of similar chemical elements the combining weight of the middle elements is the average of the combining weight of the lightest and heaviest elements of the triad.
This was the first proposed by the German scientist Johann Wolfgang Dobereiner in 1817.
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