Cuadro 14. Las configuraciones de electrones en estado de tierra de los elementos.
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Cuadro 14. Las configuraciones de electrones en estado de tierra de los elementos.
| Símbolo atómico | Número atómico | Configuración |
| H | 1 | 1s 1 |
| Él | 2 | 1s 2 |
| Li | 3 | 1s 2 2s 1 |
| Be | 4 | 1s 2 2s 2 |
| B | 5 | 1s 2 2s 2 2p 1 |
| C | 6 | 1s 2 2s 2 2p 2 |
| N | 7 | 1s 2 2s 2 2p 3 |
| O | 8 | 1s 2 2s 2 2p 4 |
| F | 9 | 1s 2 2s 2 2p 5 |
| Ne | 10 | 1s 2 2s 2 2p 6 |
| Na | 11 | [Ne] 3s 1 |
| Mg | 12 | [Ne] 3s 2 |
| Al | 13 | [Ne] 3s 2 3p 1 |
| Si | 14 | [Ne] 3s 2 3p 2 |
| P | 15 | [Ne] 3s 2 3p 3 |
| S | 16 | [Ne] 3s 2 3p 4 |
| Cl | 17 | [Ne] 3s 2 3p 5 |
| Ar | 18 | [Ne] 3s 2 3p 6 |
| K | 19 | [Ar] 4s 1 |
| Ca | 20 | [Ar] 4s 2 |
| Sc | 21 | [Ar] 3d 1 4s 2 |
| Ti | 22 | [Ar] 3d 2 4s 2 |
| V | 23 | [Ar] 3d 3 4s 2 |
| Cr | 24 | [Ar] 3d 5 4s 1 |
| Mn | 25 | [Ar] 3d 5 4s 2 |
| Fe | 26 | [Ar] 3d 6 4s 2 |
| Co | 27 | [Ar] 3d 7 4s 2 |
| Ni | 28 | [Ar] 3d 8 4s 2 |
| Cu | 29 | [Ar] 3d 10 4s 1 |
| Zn | 30 | [Ar] 3d 10 4s 2 |
| Ga | 31 | [Ar] 3d 10 4s 2 4p 1 |
| Ge | 32 | [Ar] 3d 10 4s 2 4p 2 |
| Como | 33 | [Ar] 3d 10 4s 2 4p 3 |
| Se | 34 | [Ar] 3d 10 4s 2 4p 4 |
| Br | 35 | [Ar] 3d 10 4s 2 4p 5 |
| Kr | 36 | [Ar] 3d 10 4s 2 4p 1 |