a I—I
£
oTO"
(a
* Ancienne classification
** Non-metaux
***Elements artificiels
bloc s ns
bloc d elements de transition
M0e fr
1
2
3
4
5
6
7
8
9
10
11
12
13
14
If
18
J7
18
*IA
IIA IIIB IV B
VB
VIB VIIB
VIII
IB
IIB
III A IV A
VA
VIA VIIA VIII
1H
2 He
Is
1
___^__^
Is
2
3 Li
4 Be I
|**5B I 6C I 7H I 8O 1 0F 10 Ne
Is
2 2s
l
Is
2
2s
2
IsW Is
2
^* Is^s
8 IsW IsW Is
2
2s
2
2p*
2P
2
-2g
2p
4
^
2p
6
11 Na 12 Mg
13A1 WSi 15 P 1§S 1TCS 18 Ar
(Ne)
(Ne)
(Ne) (Ne)' (Ne) ' (Ne) 3s
1
3s
2
3s
2
3p
1 38^ 3«
2
%
8 Sg
2
^
4 SsV 3s
2
3p
6
19 K 20 Ca 21 Sc 22 Ti 23 V 24 Cr 25 Mn 26 Fe 27 Co 28 Ni 29 Cu 30 Zn 31 Ga 32 Ge 33 As 34 Se 35 Br 36 Kr
(Ar)
(Ar) (Ar) (Ar) (Ar) (Ar) (Ar) (Ar) (Ar) (Ar) (Ar) (Ar) (Ar) (Ar)
4s
1
4s
2
SdHs
2 3d
2
4s
2 3d
3
4s
2 Sd^s
1 3d
5
4s
2 3d
6
4s
2 3d
7
4s
2 3d
8
4s
2 3d
w 4s
l 3d
10
4s
2 3d
J
4s
2 3d
10
4s
2
37 Rb 38 Sr 39 Y 40 Zr 41 Nb 42 Mo 43 Tc 44 Ru 45 Rh 46 Pd 47 Ag 48 Cd 49 In 50 Sn 51 Sb 52% 531 54Xe
#*#
55 Cs 56 Ba 57 La 72 Hf 73 Ta 74 W 75 Re 76 Os 77 Ir 78 Pt 79 Au 80 Hg 81 Tl 82 Pb 83 Bi 84 Po 85 At 86 Rn
87 Fr 88 Ra 89 Ac
58 Ce 59 Pr 60 Nd 61 Pm 62 Sm 63 Eu 64 Gd 65 Tb 66 Dy 67 Ho 68 Er 69 Tm 70 Yb 71 Lu
90 Th 91 Pa 92 U 93 Np 94 Pu 95 Am 96 Cm 97 Bk 98 Cf 99 Es
Fm
Md
No
Lw