The configuration `1s^(2)2s^(2)2p^(5)3s^(1)` shown

Options

A. excited state of `O_(2)`
B. excited state of neon
C. excited state of fluorine
D. ground state of fluorine atom

Answer

B

Explanation

Acccording to the Aufbau approcah, the ground state eletron configuration of `10` electrons should be
`1s^(2)2s^(2)2p^(6)`
Thic corresponds to the configuration of `Ne`. Thus, the given configuration is the excited state configuration of neon. On excitation, one of teh `2p` electrons moves to higher enegry subshell `3s`.