Which element trio forms a Dobereiner triad with atomic weights approximately 35.5, 80, and 127? - d and f BLOCK ELEMENTS Quiz | GKFix.in

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Which element trio forms a Dobereiner triad with atomic weights approximately 35.5, 80, and 127?

A. N, P, As
B. S, Se, Te
C. Cl, Br, I
D. O, S, Se

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