1s²2s²2p⁶ element name
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The electron configuration for Copper (Cu) is: 1s2 2s2 2p6 3s3 3p6 4s2 3d7. A chemist would shorten this notation to just "3d7" - calling Copper by the subshell of highest energy that contains any electrons.
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Neon =1s²2s²2p⁶
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