Which of the following represents an excited state of an atom?
- A\([\mathrm{Ne}]\,3s^{2}3p^{6}4s^{2}3d^{8}\)
- B\([\mathrm{Ne}]\,3s^{2}3p^{6}4s^{1}3d^{5}\)
- C\([\mathrm{Ne}]\,3s^{2}3p^{6}4s^{2}3d^{1}\)
- D\(1s^{2}2s^{2}2p^{5}3s^{1}\)
✓ Correct answer: D
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