alleryWhich 3d transition element exhibits the largest number of oxidation states?
AZn (only +2)
BSc (only +3)
CFe (+2 and +3)
DMn — +2, +3, +4, +5, +6, +7 (six states; widest range)
Answer & Solution
Correct answer: D. Mn — +2, +3, +4, +5, +6, +7 (six states; widest range)
**Manganese** exhibits the **widest range of oxidation states (+2 to +7)** in the 3d series.
This is because Mn has 7 (3d⁵ 4s²) valence electrons available and is in the middle of the series.
The early (Sc, Ti) and late (Cu, Zn) members have fewer states.
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