Question

what is the achievement of dobereiners triads


​

Answer 1

Answer:

Achievements of Dobereiner's triads :

He grouped the elements with similar chemical properties into clusters of three called 'Triads'. The distinctive feature of a triad was the atomic mass of the middle element.

Answer 2

in the year 1817 , Johann Wolfgang dobereiner a German chemist tried to arrange the elements with similar properties into groups

he identified some groups having three elements each .

so he called these groups triads

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

for example , take the triad consisting of lithium , sodium , potassium with their atomic masses 6,23,39 the average of the atomic masses of lithium and potassium is 23

hope it helps