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Dobereiner's triads table failed primarily because it was based on the observation of only a limited number of elements, which did not universally apply across the entire Periodic Table. His method of grouping elements into triads based on similar properties and their atomic weights did not consistently yield accurate predictions for all known elements. Additionally, as more elements were discovered, the relationships between atomic weights and properties became increasingly complex, highlighting the inadequacies of his approach. Ultimately, the development of a more systematic and comprehensive periodic table by later scientists, notably Mendeleev, rendered Dobereiner's triads obsolete.

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What did dobereiners law of triads state?

New land law


Did scientists support Dobereiners theory?

Some scientists supported Johann Dobereiner's theory of triads, which suggested that certain elements had similar properties and could be grouped together. However, the theory was later replaced by the modern periodic table developed by Dmitri Mendeleev.


Why dobereiners triad was rejected?

Döbereiner's triads were rejected because they did not work for all elements and their properties as more elements were discovered. They were limited to grouping only a few elements with similar properties, and the periodic table provided a more comprehensive and accurate organization of elements based on atomic number and properties.


What were the limitations of Dobereiners classification?

Dobereiner's classification, which grouped elements into triads based on similar properties, had several limitations. It only encompassed a small number of elements, primarily focusing on the known elements at the time, which were insufficient to represent the entire periodic table. Additionally, not all elements could be neatly categorized into triads, and it failed to account for the periodicity of properties across larger groups of elements. This classification system was ultimately superseded by more comprehensive frameworks, like Mendeleev's periodic table.


Which of the Dobereiner triads shown are still listed in the same column of the modern periodic table?

None of the Dobereiner triads are still listed in the same column of the modern periodic table. Dobereiner's triads were a set of three elements with similar chemical properties, but the modern periodic table is organized based on atomic number and electron configuration.


Did dobereiners triads also exist in the columns newlards octaves?

No, Dobereiner's triads were a set of three elements with similar properties where the atomic mass of the middle element was approximately the average of the other two. Newlands' Octaves, on the other hand, arranged elements in rows of seven, where every eighth element showed similar properties. These two classification schemes were different from each other.


Who arranged the elements into triads?

Dmitri Mendeleev arranged the elements into triads in the periodic table. Mendeleev noticed that elements with similar properties occurred at regular intervals when arranged by increasing atomic mass.


What are the advantage of law of triads?

The law of triads helped in identifying patterns and relationships among elements, leading to the development of the periodic table. It also played a key role in the early classification of elements based on their atomic masses and properties. However, the law of triads was later superseded by more accurate and comprehensive periodic table arrangements.


What periodic trends did did Mendeleev organize his periodic table by?

Atomic Mass Octaves and Triads


What limitation of Johann Dobereiner in periodic table?

Dobereiner gave triads for few elements. It could not be applied to other elements.So it was not considered further.


How was Döbereiner's concept of triads an important step in the developement of the periodic table?

Döbereiner (working after 1815) was the first which found some rules for the rational arrangement of chemical elements. He proposed in 1829 the law of triads - only five triads were discovered.


What was the problem with Dobereiner's periodic table?

Dobereiner's periodic table, proposed in the early 19th century, attempted to group elements into triads based on their similar chemical properties. However, this classification system was limited as it only included a few elements and did not account for all known elements at the time. Additionally, the triads were based on average atomic masses, which were not always accurate due to the existence of isotopes. This led to inconsistencies and inaccuracies in the arrangement of elements.

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