Which of the following has the maximum number of unpaired electrons?
Correct answer: D. Fe2+
- A. Mg2+
- B. V3+
- C. Ti3+
- D. Fe2+
Explanation
Iron ion (Fe2+) is the correct answer as it has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶, resulting in 4 unpaired electrons in the 3d subshell. This is the maximum number among the given options.Mg2+ has no unpaired electrons as its configuration is fully paired. V3+ has 2 unpaired electrons, and Ti3+ has 1 unpaired electron, both fewer than Fe2+.
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