Question

state dobereiner triads.​

Answer 1

Answer:

Dobereiner stated in his law of triads that the arithmetic mean of the atomic masses of the first and third element in a triad would be approximately equal to the atomic mass of the second element in that triad.

He also suggested that this law could be extended for other quantifiable properties of elements, such as density.

The first of Dobereiner’s triads was identified in the year 1817 and was constituted by the alkaline earth metals calcium, strontium, and barium. Three more triads were identified by the year 1829.

Triad 1

This triad was made up of the alkali metals lithium, sodium, and potassium.

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