Which element trio forms a Dobereiner triad with atomic weights approximately 40, 88, and 137? - d and f BLOCK ELEMENTS Quiz | GKFix.in

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Question

Which element trio forms a Dobereiner triad with atomic weights approximately 40, 88, and 137?

A. Be, Mg, Ca
B. Mg, Ca, Sr
C. Ca, Sr, Ba
D. Sr, Ba, Ra