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Chemical Formulae

A,B,C are the...

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A,B,C are the elements of a dobereiner's triad. If the atomic mass of 'A' is 9 and that of 'C' is 39, what is the atomic mass of element 'B' ?

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Q. Given below are the elements with their atomic masses. Identify a set of elements which is not a Dobereiner Triad?

Q. Given below are the elements with their atomic masses. Identify a set of elements which is not a Dobereiner triad.

(a) 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?

(b) Why was Dobereiner's triad discarded?

Q. In Dobereiner classification of elements, the atomic weight of the middle element is equal to the ________ of the extreme elements of a triad.

Q. Elements x, y and z forms Dobereiner's triad. If the atomic mass of element x and z are

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respectively, then what is the atomic mass of element y?

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