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Question
Q123)Given the set of possible quantum numbers that describes the highest energy electron in neon when the atom is in its first excited state.
a)n=2, l=1, l=-1, s=1/2
b) n=3, l=1, l=-1, s=1/2
c) n=3, l=0, l=0, s=1/2
d)n=3, l=1, l=0, s=1/2
SOLUTION
[Ne]=1s
2
2s
2
2p
6
After excitation EC=1s
2
2s
2
2p
5
3s
1
Answer:(c)