Chemistry (12th Grade)
Electron Configuration
What is the electron configuration of a sodium (Na) atom?
1s² 2s² 2p⁶ 3s¹
1s² 2s² 2p⁶ 3p¹
1s² 2s² 2p⁶ 3s²
1s² 2s² 2p⁶ 3s² 3p⁶
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