Why is the 11th electron of the sodium atom located in the 3rd energy level

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SUMMARY

The 11th electron of the sodium atom is located in the third energy level due to the specific electron configuration of sodium, which is 1s² 2s² 2p⁶ 3s¹. The first and second energy levels are filled with a total of 10 electrons, adhering to the maximum capacity of 2 and 8 electrons, respectively. Consequently, the next electron occupies the 3s orbital in the third energy level, as dictated by the Aufbau principle and the Pauli exclusion principle.

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Q: Why is the 11th electron of the sodium atom located in the third energy level rather than in the second energy level?

xD
 
Physics news on Phys.org
Why? Because.
 
Each energy level holds a certain number of atoms. These numbers should have been discussed in class lectures or the textbook.
 

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