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Question

Among the following, the configuration 1s22s22p53s1 is valid for the:

A
Ground state of fluorine
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B
Excited state of fluorine
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C
Excited state of neon
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D
Excited state of sodium
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Solution

The correct option is C Excited state of neon
The given configuration has total 10 electrons and Neon also has 10 electrons, with ground electronic configuration as 1s22s22p6.
If one eletron is excited from its outermost subshell i.e 2p to next subshell i.e. 3s. The electronic configuration of excited state of Neon will be 1s22s22p53s1.

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