Which of the following has the maximum number of unpaired electrons?
Correct answer: A. Fe²⁺
- A. Fe²⁺
- B. Mn4⁺
- C. Cr³⁺
- D. Cu²⁺
Explanation
The electron configuration of Fe²⁺ is [Ar] 3d⁶. In the 3d orbital, there are 4 unpaired electrons.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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