Why do transition elements act as good catalysts ?

(a) Why do transition metals act as good catalysts? (b) Why do transition metals form alloys ? (c) What are coinage metals ?

Why transition metals act as good catalysts ?

Transition elements act as good catalysts because

Transition element act as good catalysts because

Transition elements act as catalysts. Why?

Transition elements act as catalyst because-

Which property of the transition elements makes them good catalysts?

Why 3d-series of elements acts as good catalyst?