Question

what is a Dobereiner's triads ? Explain​

Answer 1

Dobereiner's Triads are groups of three elements arranged in such a way that the atomic weight of the middle element is almost the average of the other two. The elements of triad have almost similar properties.

For example: Alkali metal group ( Dobereiner's triad) : Lithium is the 1st element, sodium is the middle element whereas potassium is the 3 rd element of the triad.

${ \huge\rm \pink {H}\rm \blue {A} \rm \purple {N}\ \rm \green{J} \rm\red {U}\ \rm \orange {H} \rm{U} \rm \gray{I}}$