Q.

Which of the following represents an excited state of an atom?

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a

[Ne]3s23p64s23d8

b

[Ne]3s23p64s13d5

c

[Ne]3s23p64s23d1

d

1s22s22p53s1

answer is D.

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Detailed Solution

10Ne⟶1s22s22p6 Excited state of Ne is 1s22s22p53s1.
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