State the law of dobereiners triads
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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.
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According to Dobereiner, element having similar properties can be arranged in traids in which atomic mass of the middle element is the mean of the atomic masses of the other two elements.
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