Question

. State Dobereiner's law of triads with suitable example.
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Answer 1

Answer:

Explanation:

Dobereiner's law of triads :

The arithmetic mean of the atomic mass all the chemical elements present in a Dobereiner's triad is nearly equal to the atomic mass of the second element of that particular triad.

• This Dobereiner's law of triads was one of the preliminary attempts for creating the periodic table. Although,this law is very limited and it is not used in the modern periodic table.

• The example of Dobereiner's triad is -

Lithium, Sodium and Potassium.

The arithmetic mean of the atomic masses these three elements is approximately 23.02 and the atomic mass of the second element sodium is 22.99,so the values are almost equa

Answer 2

Answer:

He arranged the three elements in a triad in an increasing order of atomic mass and showed that the atomic mass of the middle element was approximately equal to the mean of the atomic masses of the other elements. Examples : Lithium (Li), Sodium (Na), Potassium (K) from Dobereiner's tried.

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