Question

HEYYA FRNDS ...... explain dobereiner's triads and limitations

Answer 1

Explain Dobereiner's Triad. According to Dobereiner, all elements occurred in groups of three, when arranged in increasing order of atomic masses. ...Dobereiner's law of triads states that, the atomic mass of the middle element of a triad is the arithmetic mean of the atomic masses of the other two elements.

Limitations of Dobereiner's classification: 
Dobereiner could find only three triads; .i.e total of 9 elements only. However the total number of elements were more than that of those encompassed in Dobereiner's Triad. Thus, Dobereiner's could not be classify most of the elements known at that time.

Answer 2

Dobereiner's law of triads states that, the atomic mass of the middle element of a triad is the arithmetic mean of the atomic masses of the other two elements. Example: In the triad of lithium, sodium and potassium.

Two important limitations are:

• All known elements could not be classified into groups of triads on the basis of their properties .

• Not all groups obeyed the Law of Triads. For example, nitrogen family does not obey the Law of Triads.

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