Nitrogen and phosphorus have 3 of their valence electrons unpaired because of:
Correct answer: C. Hund's rule
- A. Auf bau principle
- B. Heisenberg's principle
- C. Hund's rule
- D. Planck's statement
- E. None of these
Explanation
Hund's rule states that every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.
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About Atomic Structure
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