In Dobereiner’s triad containing Li, Na, K, if atomic masses of Lithium & Potassium are 6.9 and 39.1, then what will be the atomic mass of Sodium?
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Solution
According to Dobereiner’s triad rule :
Atomic Mass of Sodium = `(6.9+39.1)/2 = 23`
Concept: Dobereiner’s Triads
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