Practice — Classification of Elements and Periodicity in Properties — StudyLoop

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Dobereiner's triad idea is tested for chlorine, bromine and iodine. If the atomic masses of chlorine and iodine are about

35.5

and

127

, the predicted atomic mass of the middle element is closest to

Choose an answerA.

81

B.

162.5

C.

127

D.

46

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