Question

Which one of the following belongs to the group of atomic weights of Dobereiner triads ?

A)

40, 87.5, 120

B)

40, 87.5, 127

C)

40, 77.5, 137

D)

40, 87.5, 137​

Answer 1

Answer:

By 1829, Döbereiner had found other groups of three elements (hence "triads") whose physical properties were similarly related.

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Answer 2

Explanation:

what is the option of the question