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A,B and C are the elements of a Deoberei...

`A,B` and `C` are the elements of a Deobereiner's triad. If th atomic mass of `A` is 7 and that of `C` is 39, what should be the atomic mass of `B` ?

A

21

B

20

C

23

D

18

Text Solution

Verified by Experts

The correct Answer is:
C
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