Give 2 advantages and disadvantages of Dobernier's triads - Science - Periodic Classification of Elements

Question

Give 2 advantages and disadvantages of Dobernier's triads

Rosy · Accepted Answer

Dobereiners law of triads failed for the following
reasons :

all the then known elements could not be arranged in the form of
triads

for very low mass or for very high mass elements, the law was
not holding good Take the example of F, Cl, Br Atomic mass of Cl is
not an arithmetic mean of atomic masses of F and Br
The only advantage of Dobereiners research was
that it made chemists look at elements in terms of groups of
elements with similar chemical and physical properties This
eventually led to rigorous classification of elements and the
modern periodic table of elements, as we now know it, was
discovered

Give 2 advantages and disadvantages of Dobernier's triads.