First element in periodic table
Answer
Element Electronic configuration
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Hydrogen 1s¹
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Helium 1s²
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Lithium 1s² 2s¹
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Beryllium 1s² 2s²
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Boron 1s²2s²2p¹
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Carbon 1s²2s²2p²
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Nitrogen 1s²2s²2p³
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Oxygen 1s²2s²2p⁴
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Fluorine 1s²2s²2p5
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Neon 1s²2s²2p6
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