Question

Why Hund's rule is not applicable for chlorine?

Answer 1

Explanation:

The number of singly occupied orbitals or unpaired electrons will decrease if Hund's rule is not applied. Total unpaired electrons if Hund's rule is followed is 5. Hence only one electron will be unpaired if this rule is not followed or is not applicable in a NO molecule.

This electron has a down spin, corresponding to the spin number -1/2. If you were to just count the electrons from the bottom-up, you would get the 16th electron to be the 2nd electron in the second 3p sub shell. Although this would get the right answer for chlorine, it would not for other elements like oxygen

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Answer 2

Explanation:

Here is your answer

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