Which pair of ions have five unpaired d-electrons?
Correct answer: D. Fe+3 and Mn+2
- A. Fe+2 and Mn+2
- B. Fe+2 and Mn+3
- C. Fe+3 and Mn+3
- D. Fe+3 and Mn+2
Explanation
Here's a breakdown of the electron configurations for each ion:Fe+3: [Ar] 3d5Mn+2: [Ar] 3d5As you can see, both ions have 5 unpaired electrons in their d orbitals
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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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