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Question
What was Dobereiner’s basis, of classification of elements?
Solution
Basis of classification was that “there was a close relationship between the properties of an element and its atomic mass”.
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RELATED QUESTIONS
The arrangement of elements in a group of three is known as ________.
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.
A, B and C are the elements of a Dobereiner's triad. If the atomic mass of A is 7 and the of C is 39, what should be the atomic mass of B?
What is Debereiner's law of triads? Explain with the help of one example of a Dobereiner's triad.
The atomic masses of three elements X, Y and Z having similar chemical properties are 7, 23 and 39 respectively.
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(b) How does the average atomic mass of elements X and Z compare with the atomic mass of element Y?
(c) Which law of classification of elements is illustrated by this example?
(d) What could the elements X, Y and Z be?
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Be, Mg, Ca
Atomic mass of Be - 9, Mg - 24, Ca - 40.
Justify your answer.
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Write the characteristic of Dobereiner’s triads?
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Li, Na, K F, Cl, Br
