Dobereiner's Law of Triads proposed that groups of three elements with similar properties could be arranged in such a way that the Atomic Mass of the middle element was approximately the average of the other two. However, this classification system was limited as it only applied to a small number of elements and did not account for the vast majority of known elements at the time. Additionally, as new elements were discovered, the triad concept failed to provide a comprehensive framework for organizing them. Consequently, it was overshadowed by more systematic classification methods, like Mendeleev's Periodic Table.
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.
the main defect of' dobereiner's triads is that he put the chemically dissimilar elements in the same triads (dahal.ramchandra@gmail.com)
Antoine Lavoisier and Johann Wolfgang Döbereiner made contributions to the development of the periodic table before Mendeleev and Meyer. Lavoisier proposed a classification system based on properties of elements, and Döbereiner developed the concept of triads, which grouped elements with similar properties.
Dobereiner gave triads for few elements. It could not be applied to other elements.So it was not considered further.
All the elements known at that time could not be arranged as Dobereiner's triad's example: the three elements, nitrogen, phosphorus and arsenic have similar properties. Therefore they can be regarded to form a triad. However, the actual atomic mass if the middle element, phosphorus(P)(31.0u)is much lower than the average or mean(44.45u)of the atomic masses of nitrogen and arsenic. Thus, these three elements do not constitute a Dobereiner triad in spite of their similar chemical properties.
New land law
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.
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.
Dobereiner's classification system had limitations because it only grouped elements based on triads and did not account for all known elements at the time. Additionally, the system did not explain why elements within triads had similar chemical properties. It was also limited by its inability to accommodate elements that did not fit neatly into triads.
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.
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.
johann dobereiner had contributed towards the base of the periodic table and discovered that the elements shared similiar properties because there always was three elementzs in three groups that he later refered to as 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.
the main defect of' dobereiner's triads is that he put the chemically dissimilar elements in the same triads (dahal.ramchandra@gmail.com)
John Dalton was the first person to begin ordering the elements. He did this according to atomic mass. John Newlands developed this idea further and noticed that there were similarities in ever eighth element, he called this "the law of octaves'. Newlands called each group (column) of three elements a 'triad'
Johann Dobereiner grouped elements with similar properties into triads. In these triads, he observed that the properties of the middle element were the average of the other two.
Antoine Lavoisier and Johann Wolfgang Döbereiner made contributions to the development of the periodic table before Mendeleev and Meyer. Lavoisier proposed a classification system based on properties of elements, and Döbereiner developed the concept of triads, which grouped elements with similar properties.