Choose the correct set of quantum numbers for a valence electron of a Ne atom in the second excited state:
Correct answer: D. 3, 1, 2, +1/2
- A. 2, 0, 0, +1/2
- B. 3, 2, 1, +1/2
- C. 3, 0, 0, +1/2
- D. 3, 1, 2, +1/2
Explanation
The ground state of Ne is 1s²2s²2p⁶. To reach the second excited state, a 2p electron is promoted to the next available higher energy level. The first excitation is to 3s, the second is also to 3s. The quantum numbers for an electron in the 3s orbital are n=3, l=0, m=0, and s can be +1/2
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