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Question
Explain why Dobereiner’s method of classification of elements did not hold much weightage for future classification.
Solution
Reasons for discarding the law of triads:
- Only three triads could be formed and was not holding for other elements.
- The law was not applicable even in the same family.
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RELATED QUESTIONS
What were the limitations of Dobereiner’s classification?
The modern periodic table has been evolved through the early attempts of Dobereiner, Newland and Mendeleev. List one advantage and one limitation or all the three attempts.
Name the scientist who gave Law of triads in the early classification of elements.
The three imaginary elements X, Y and Z represent a Dobernener's triad. If the atomic mass of element X is 14 and that of element Y is 46, then the atomic mass of element Z will be:
(a) 28
(b) 60
(c) 78
(d) 72
Can the following groups of elements be classified as Dobereiner's triads?
(a) Na, Si, Cl
(b) Be, Mg, Ca
Give reason for your answer.
(Atomic masses : Be 9 ; Na 23 ; Mg 24 ; Si 28 ; Cl 35.5 ; Ca 40)
With an example, explain Dobereiner's Triads.
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Na, Si, Cl
Atomic mass of Na - 23, Si - 28, Cl - 35.
Justify your answer.
What was Dobereiner’s basis, of classification of elements?
Find the odd one out and give its explanation.
If Dobereiner is related with ‘law of triads’, then Newlands is related with ______.
