A. 1s22s22px22py0
A. 1s22s22px12py1
C. 1s22s12px12py12pz1
D. 1s12s22px12py1

Correct Answer:

Option C – 1s22s12px12py12pz1


– So any electron configuration in which the last electron (again, the valence electron) is in a higher energy orbital, this element is said to be in an excited state.

– When a carbon atom becomes excited by absorbing energy, one of its 2s electrons is promoted into the 2p sublevel.

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