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प्रश्न
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?
उत्तर
A, B and C are the elements of a Dobereiner's triad. If the atomic masses of A and C are 7 and 39 respectively, then according to Dobereiner's triad law, the atomic mass of B is the average of the atomic masses of A and C.
So, the average of the atomic masses of A and C `=(7+39)/2= 46/2=23`
Therefore, the atomic mass of B is 23.
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संबंधित प्रश्न
What were the limitations of Dobereiner’s classification?
State one example of a Dobereiner's triad, showing in it that the atomic mass of middle element is half-way between those of the other two.
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
The atomic masses of three elements X, Y and Z having similar chemical properties are 7, 23 and 39 respectively.
(a) Calculate the average atomic mass of elements X and Z.
(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?
(e) Give another example of a set of elements which can be classified according to this law.
A, B and C are the elements of a Dobereiner's triad. If the atomic mass of A is 7 and that of C is 39, what should be the atomic mass of B?
Why was Dobereiner's triad discarded?
With an example, explain Dobereiner's Triads.
Explain why Dobereiner’s method of classification of elements did not hold much weightage for future classification.
According to Dobereiner’s triads rule, three elements in an increasing order of atomic mass shows _______.
If Dobereiner is related with ‘law of triads’, then Newlands is related with ______.
