The orbitals of a nitrogen atom may be represented by which of the following arrangement of electrons in the ground state?
Correct answer: B. Option B
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
Nitrogen has 7 electrons. The first 2 fill the 1s orbital, next 2 fill the 2s orbital. The remaining 3 electrons occupy the three degenerate 2p orbitals singly, following Hund's rule, which states that electrons fill degenerate orbitals singly with parallel spins before pairing. This gives the ground-state electron configuration of nitrogen.
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