The electrons would go to lower energy levels first and then to higher energy levels according to which of the following

Options :
  1. Aufbau principle
  2. Pauli''s principle
  3. Hund''s rule
  4. none of the above
Answer and Explanation :-

Answer: Option 1


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It's not surprising, therefore, that the [Bisy] Backson thinks of progress in terms of fighting and overcoming. One of his little idiosyncrasies, you might say. Of course, real progress involves growing and developing, which involves changing inside, but that's something the inflexible Backson is unwilling to do.
-Benjamin Hoff The Tao of Pooh