Question

write limitation of dobereiner law

Answer 1

see the above picture to understand dobernieer trades

Answer 2

The German chemist, Johann Dobereiner in early 1800’s was the first to consider the idea of trends among properties of elements. By 1829 he noted a similarity among the physical and chemical properties of several groups  of three elements (Triads).

In each case, he noticed that the middle  element  of each of the Triads had an atomic weight about half way between the atomic weights of the other two

Also the properties of the middle element were in between those of the othertwo member