What is Dobereiners triads
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Dobereiner's triads were groups of elements with similar properties that were identified by the German chemist Johann Wolfgang Dobereiner. He observed that groups of three elements (triads) could be formed in which all the elements shared similar physical and chemical properties.
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Dobernier is scientist
he tried to arrange all the elements in order
at his time only some elements are discovered
he took 3 elements
the average mass of 1st and 3rd element is equal to second element
BUT THIS ARRANGEMENT IS NOT SATISFIED FOR ALL ELEMENTS
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