Electronic configuration of the first 15 elements

Here are the electronic configurations for the first 15 elements:

1. Hydrogen (H): $1s^1$
2. Helium (He): $1s^2$
3. Lithium (Li): $1s^2 2s^1$
4. Beryllium (Be): $1s^2 2s^2$
5. Boron (B): $1s^2 2s^2 2p^1$
6. Carbon (C): $1s^2 2s^2 2p^2$
7. Nitrogen (N): $1s^2 2s^2 2p^3$
8. Oxygen (O): $1s^2 2s^2 2p^4$
9. Fluorine (F): $1s^2 2s^2 2p^5$
10. Neon (Ne): $1s^2 2s^2 2p^6$
11. Sodium (Na): $1s^2 2s^2 2p^6 3s^1$ or $[\text{Ne}] 3s^1$
12. Magnesium (Mg): $1s^2 2s^2 2p^6 3s^2$ or $[\text{Ne}] 3s^2$
13. Aluminum (Al): $1s^2 2s^2 2p^6 3s^2 3p^1$ or $[\text{Ne}] 3s^2 3p^1$
14. Silicon (Si): $1s^2 2s^2 2p^6 3s^2 3p^2$ or $[\text{Ne}] 3s^2 3p^2$
15. Phosphorus (P): $1s^2 2s^2 2p^6 3s^2 3p^3$ or $[\text{Ne}] 3s^2 3p^3$