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Modern Periodic Table

Triads of ele...

Question

Triads of elements arranged in increasing order of their atomic masses were proposed by-

A

Lothar Meyer

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B

Dobereiner

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C

Dmitri Mendeleev

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D

Ernest Rutherford

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Solution

The correct option is B
Dobereiner

Triads of elements ,with similar properties, arranged in increasing order of their atomic masses were proposed by Dobereiner.

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Similar questions

Q. Döbereiner arranged the elements in triads in the increasing order of their .

Q. According to Newlands' law of octaves, the elements were arranged in the increasing order of their atomic masses.

Q. Mendeleev arranged the elements in increasing order of their atomic masses and according to their physical properties.

Q. In Dobereiner's triads, when three elements in a triad are written in the increasing order of atomic masses; the atomic mass of the middle element is roughly the average of the atomic masses of the other two elements. Identify ‘X’ from the given triad.
Li (6.9), Na (X), K (39.0).

Q. According to Mendeleev's periodic law, the elements were arranged in the periodic table in the order of:

(a) decreasing atomic numbers
(b) increasing atomic numbers
(c) decreasing atomic masses
(d) increasing atomic masses

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