Which of the following configurations depicts an excited oxygen atom?

A)1s2 2s2 2p2
B)1s2 2s2 2p2 3s2
C)1s2 2s2 2p1
D)1s2 2s2 2p4
E)[He]2s2 2p4


The second number after the letter is a superscript, sorry if it looks confusing!

Answer:
To be excited, it's got to have electrons higher than 2p4, so it's B.
D
B
remember that the atom of Oxygen have 8 electrones!
The normal structure is D, but if the Oxygen HAVE BEEN EXCITED, the answer will be:

B) 1s2 2s2 2p2 3s2

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