Question

Answer this question in brief.​

Answer 1

Dobereiners traids are group of atoms arranged in such a way that the atomic weight of the middle element is almost the average of the other two

example:Traid 1

this traid was made up of alkali metals lithium sodium and potassium

The arithmetic mean of the masses of potassium and lithium corresponds to 23.02 which is almost equal to the atomic mass of sodium

Answer 2

according to this traids, the atomic mass of second element is approximately equal to the Arthimatic mean of the atomic mass of first and third element.

example -lithium-7, potassium-39

7+39/2

46/2

23

23 is the atomic mass no of sodium.