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CBSE Class 12 · 2020 · d and f Block ElementsMultiple Choice

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Out of the following transition elements, the maximum number of oxidation states is shown by:
  1. (A)Sc (Z = 21)
  2. (B)Cr (Z = 24)
  3. (C)Mn (Z = 25)✓ Correct
  4. (D)Fe (Z = 26)

Answer: (C)

Solution

Manganese ([Ar]3d4s) has the greatest number of removable/shareable electrons — it shows every state from +2 to +7 (and the middle of the series always shows the widest range).
Correct option: (C) Mn.

CBSE Class 12 Board · 2020 · Single correct option

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