Question

1) a)
State Doberneiner's Law of triads
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Answer 1

the atomic wieght of middle element is nearly the same as average of the atomic wieght of other two elements.

Answer 2

$\huge\red{Heya \: Mate}$.....

1.In 1817 a German chemist Johann Wolfgang Döbereiner arranged the elements with similar properties into groups.

2.Some groups were identified having three elements each. So he called these groups ‘triads’. Only three triads could be identified from the elements discovered at that time.

3.On writing the three elements of the triad in the order of increasing atomic masses it was found that the atomic mass of the middle element was approximately the average of the atomic masses of the other two elements.


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