Lithium, sodium and potassium form a Dobereiner's triad. The atomic ma – InterviewSolution

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1.	Lithium, sodium and potassium form a Dobereiner's triad. The atomic masses of lithium and potassium are 7 and 39 respectively. Predict the atomic mass of sodium.
Answer» SOLUTION :ATOMIC MASS of NA = `(7+39)/2=46/2=23`

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