Question

We the charactersties of Doberineer traid?​

Answer 1

Answer:

According to dobeirner's triad when elements were arranged in the order of increasing atomic mass.It was observed that the mass of middle atom was roughly equal to the average atomic masses of the side ones.

Answer 2

Answer:

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Explanation:

Dobereiner's Triad -

He found that the atomic mass of the middle element was approximately equal to the arithmetic mean (average) of the atomic masses of the other two elements of that triad when they are arranged in their increasing order of atomic mass, ... The atomic mass of Li is 9 and K is 39.

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