1. Tardigrade
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  3. Chemistry
  4. If the nitrogen atom had electronic configuration 1 texts7 , it would have energy lower than that of the normal ground state configuration 1 texts2 2 texts22 textp3 because the electrons would be closer to the nucleus. Yet 1 texts7 is not observed because it violates

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Q. If the nitrogen atom had electronic configuration $1\text{s}^{7}$ , it would have energy lower than that of the normal ground state configuration $1\text{s}^{2} \, 2\text{s}^{2}2\text{p}^{3}$ because the electrons would be closer to the nucleus. Yet $1\text{s}^{7}$ is not observed because it violates

NTA AbhyasNTA Abhyas 2022

Solution:

Not more than two electrons can be present in same atomic orbital. This is Paulis exclusion principle.