Q. The number of unpaired electrons in Fe²⁺ (Z = 26) is:
Fe²⁺ (Z = 26) में अयुग्मित इलेक्ट्रॉनों की संख्या है:
Explanation
Electronic configuration of Fe (Z = 26): [Ar] 3d⁶ 4s²
For Fe²⁺, remove two electrons → [Ar] 3d⁶
3d⁶ has 4 unpaired electrons in a high-spin configuration (according to Hund’s Rule).
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