The element that acts as a good catalyst for several reactions has a atomic number:
A
16
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B
20
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C
28
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D
37
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Solution
The correct option is B 28 Transition element with atomic no. 28 (Nickel) acts as very good catalyst.The transition metals and their compounds are known for their catalytic activity. This activity is ascribed to their ability to adopt multiple oxidation states and to form complexes.