In which of the following electronic configurations are only two of the electrons unpaired?
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1s² 2s²
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1s² 2s² 2p³
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1s² 2s² 2p⁴
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1s² 2s² 2p⁵
📝 Detailed explanation
In 2p⁴, two electrons remain unpaired according to Hund's rule.
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