How many electrons can have the values n=2, l=1, and s=+½ in the configuration 1s2, 2s2, 2p3?
Correct answer: B. 3
- A. 1
- B. 3
- C. 5
- D. 7
- E. 9
Explanation
2nd shell has a principal quantum number(n)=2; p-orbital has an azimuthal quantum number(l)=1; spin state=+½ implies electron spinning in the anti-clockwise direction. Anti-clockwise spinning electron in p orbital and in 2nd shell there are 3 of them in the scenario above.
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