n | I | II | III | IV | V | VI | VII | VIII |
1 K | 1 1s1 H |
2 1s2 He |
||||||
2 L | 3 2s1 Li |
4 2s2 Be |
5 2s2, 2p1 B |
6 2s2, 2p2 C |
7 2s2, 2p3 N |
8 2s2, 2p4 O |
9 2s2, 2p5 F |
10 2s2, 2p6 Ne |
3 M | 11 3s1 Na |
12 3s2 Mg |
13 3s2, 3p1 Al |
14 3s2, 3p2 Si |
15 3s2, 3p3 P |
16 3s2, 3p4 S |
17 3s2, 3p5 Cl |
18 3s2, 3p6 Ar |
4 N | 19 4s1 K |
20 4s2 Ca |
31 4s2, 4p1 Ga |
32 4s2, 4p2 Ge |
33 4s2, 4p3 As |
34 4s2, 4p4 Se |
35 4s2, 4p5 Br |
36 4s2, 4p6 Kr |
5 O | 37 5s1 Rb |
38 5s2 Sr |
49 5s2, 5p1 In |
50 5s2, 5p2 Sn |
51 5s2, 5p3 Sb |
52 5s2, 5p4 Te |
53 5s2, 5p5 I |
54 5s2, 5p6 Xe |
6 P | 55 6s1 Cs |
56 6s2 Ba |
81 6s2, 6p1 Tl |
82 6s2, 6p2 Pb |
83 6s2, 6p3 Bi |
84 6s2, 6p4 Po |
85 6s2, 6p5 At |
86 6s2, 6p6 Rn |
7 Q | 87 7s1 Fr |
88 7s2 Ra |
tabella periodica
semplificata, ridotta :
gruppi
verticali :I > VIII
periodi orizzontali :1 (K) > 7 (Q)
per ogni elemento :
numero atomico, , simbolo, configurazione
ultimo livello