Question

What is meant by doberener's traid? Write down three elements which represent dobereiner triad?

Answer 1

dobernier traid is a group of arrangements of elements that it is easy to study that sum of atomic mass two side element is approx equal to middle

ex-Li Na K

Answer 2

Döbereiner showed that when the three elements in a triad were written in the order of increasing atomic masses; the atomic mass of the middle element was roughly the average of the atomic masses of the other two elements.