Question

atomic numbers and electron configurations
quiz complete
1 2 3 4 5 6 7 8 9 10
consider the model of the nitrogen atom.
which electron configuration matches this model?
○ $1s^22s^22p^2$
○ $1s^22s^22p^3$
○ $1s^22s^22p^4$
○ $1s^22s^22p^5$

Explanation:

Step1: Find total electrons

Nitrogen has atomic number 7, so total electrons = 7.

Step2: Fill orbitals by Aufbau principle

First fill [Client Connection Error]1s (holds 2): $1s^2$, remaining electrons = $7-2=5$
Fill 2s (holds 2): $2s^2$, remaining electrons = $5-2=3$
Fill 2p (holds 6, use 3): $2p^3$

Step3: Combine orbitals

Total configuration: $1s^22s^22p^3$

Answer:

1s²2s²2p³