Question

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......?​

Answer 1

6.9+39.1/2

46/2

23 u is the atomic mass of Sodium

Answer 2

Hi mate

Here is ur answer....

Dobereiner's traids

The average of 1st and last mass will be the mass of middle one...

so , atomic mass of Na = atomic mass of Li n K / 2

= 6.9 + 39/2

=7+39/2

= 46/2

=23

atomic mass of Na = 23

i hope this will help u....

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