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प्रश्न
In Dobereiner’s triads Li, Na, K, the atomic masses of Lithium and Potassium are 6.9 and 39.1 respectively, then what will be the atomic mass of sodium?
थोडक्यात उत्तर
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उत्तर
According to Doberiner’s triads, the average atomic mass of two elements is the atomic mass of the third element in a series Na and K.
Average atomic mass of sodium = `"Atomic mass of Li and K"/2`
`= (6.9+39.1)/2`
= `46/2`
= 23
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