Question

Limitation of Doberiegner triads

Answer 1

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☞ He could identify only 3 triads from the elements known at that time.

Answer 2

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All known elements could not be classified into groups of triads on the basis of their properties. Not all groups obeyed the Law of Triads. For example, the Nitrogen family does not obey the Law of Triads. Doberiner could identify only three triads.