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Question
Which of the following violates Hund's rule?
Which of the following violates Hund's rule?
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Solution
The correct option is C
Hund's rule states that pairing of electrons in the orbitals belonging to the same subshell (p, d or f) does not take place until each orbital belonging to that subshell has got one electron each i.e., it is singly occupied. In the third case, third orbital of p is not filled and there are two electrons in the first orbital of p. Therefore, this violates Hund's rule.
Hund's rule states that pairing of electrons in the orbitals belonging to the same subshell (p, d or f) does not take place until each orbital belonging to that subshell has got one electron each i.e., it is singly occupied. In the third case, third orbital of p is not filled and there are two electrons in the first orbital of p. Therefore, this violates Hund's rule.
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