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The concept of triads in the elements was given by
- a)Newlands
- b)Dobereiner
- c)Mendeleev
- d)Bohr
Correct answer is option 'B'. Can you explain this answer?
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The concept of triads in the elements was given bya)Newlandsb)Doberein...
Dobereiner gave the concept of triads.
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The concept of triads in the elements was given bya)Newlandsb)Doberein...
**Dobereiner, a German scientist, was the first to classify elements into groups based on John Dalton's assertions. He grouped the elements with similar chemical properties into clusters of three called 'Triads'.
* The distinctive feature of a triad was the atomic mass of the middle element.
* The distinctive feature of a triad was the atomic mass of the middle element.
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The concept of triads in the elements was given bya)Newlandsb)Doberein...
In the history of the periodic table, Dobereiner's triads were an early attempt to sort the elements into some logical order by their physical properties. In 1817, a letter reported Johann Wolfgang Dobereiner's observations of the alkaline earths; namely, that strontium had properties that were intermediate to those of calcium and barium. By 1829, Dobereiner had found other groups of three elements (hence "triads") whose physical properties were similarly related. He also noted that some quantifiable properties of elements (e.g. atomic weight and density) in a triad followed a trend whereby the value of the middle element in the triad would be exactly or nearly predicted by taking the arithmetic mean of values for that property of the other two elements
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The concept of triads in the elements was given bya)Newlandsb)Dobereinerc)Mendeleevd)BohrCorrect answer is option 'B'. Can you explain this answer?
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