Question

state dobereiners law of triads givin one example​

Answer 1

Answer:

Johann Wolfgang Dobereiner stated the traids form of classification. He gave three triads having three elements each. It meant that the middle element in each triad will be similar in the properties with the other two elements in the triad. The mass of the middle element will be the arithemetic mean of the other two elements in the triad.

Explanation:

Examples: Lithium; Sodium; Potassium

Li=6.941 u; K=39.0983 u therefore, Na will have the mass=$\frac{Li+K}{2}$=$\frac{6.941+39.0983}{2}$=22.989769 u (which is approx. 23)