1.

ii) 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?

Answer»

According to Dobernier triads , Atomic mass of middle atom of traid is airthmetic mean of other two atoms Atomic mass of Na = (6.9 + 39.1)/ 2 = 46/2 = 23u



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