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Verified Answer & Explanation⌄

Correct Answer: B) N⁻

Concept Explanation

N⁻ has 8 electrons: 1s² 2s² 2p⁴ After losing one electron: N⁻ → N + e⁻ Nitrogen has: 1s² 2s² 2p³ The 2p subshell is then exactly half-filled.

Topic: Half-Filled Subshells and Electronic ConfigurationPractice more Half-Filled Subshells and Electronic Configuration MCQs →