1. La Tabla Periódica

5. I A II A Berilio Be
Z = 4
1 S2
- 2 S22 S2
Cesio; Cs
Z = 55
1 S2
– 2S2
– 2 P6
–
3 S2
– 3 P6
– 4S2
–
3D10
– 4 P6
– 5 S2
–
4 D10
– 5 P6
– 6 S1
6 S1

7. Escandio Sc
Z = 21
1 S2
– 2S2
– 2 P6
–
3 S2
– 3 P6
– 4S2
–
3D1
Zn
Z = 30
1 S2
– 2S2
– 2 P6
– 3
S2
– 3 P6
– 4S2
– 3D10

9. Boro B
Z = 5
1 S2
- 2 S2
– 2 P1
Yodo I
Z = 53
1 S2
– 2S2
– 2 P6
– 3 S2
–
3 P6
– 4S2
– 3D10
– 4 P6
–
5 S2
– 4 D10
– 5 P5

11. Lantano. La
Z = 57
1 S2
– 2S2
– 2 P6
– 3 S2
– 3 P6
–
4S2
– 3D10
– 4 P6
– 5 S2
– 4 D10
–
5 P6
– 6 S2
– 4 F1
Tulio. Tm
Z = 69
1 S2
– 2S2
– 2 P6
– 3 S2
– 3 P6
–
4S2
– 3D10
– 4 P6
– 5 S2
– 4 D10
–
6 2 13