|
N
|
Elemento
|
Simbolo
|
Peso atomico
|
|
1
|
Idrogeno |
H
|
1,0079
|
|
2
|
Elio |
He
|
4,0026
|
|
3
|
Litio |
Li
|
6,941
|
|
4
|
Berillio |
Be
|
9,0122
|
|
5
|
Boro |
B
|
10,81
|
|
6
|
Carbonio |
C
|
12,011
|
|
7
|
Azoto |
N
|
14,0067
|
|
8
|
Ossigeno |
O
|
15,9994
|
|
9
|
Fluoro |
F
|
18,9984
|
|
10
|
Neon |
Ne
|
20,179
|
|
11
|
Sodio |
Na
|
22,98977
|
|
12
|
Magnesio |
Mg
|
24,305
|
|
13
|
Alluminio |
Al
|
26,9815
|
|
14
|
Silicio |
Si
|
28,0855
|
|
15
|
Fosforo |
P
|
30,9738
|
|
16
|
Zolfo |
S
|
32,06
|
|
17
|
Cloro |
Cl
|
35,453
|
|
18
|
Argon |
Ar
|
39,948
|
|
19
|
Potassio |
K
|
39,0983
|
|
20
|
Calcio |
Ca
|
40,08
|
|
21
|
Scandio |
Sc
|
44,9559
|
|
22
|
Titanio |
Ti
|
47,88
|
|
23
|
Vanadio |
V
|
50,9415
|
|
24
|
Cromo |
Cr
|
51,996
|
|
25
|
Manganese |
Mn
|
54,9380
|
|
26
|
Ferro |
Fe
|
55,847
|
|
27
|
Cobalto |
Co
|
58,9332
|
|
28
|
Nichel |
Ni
|
58,69
|
|
29
|
Rame |
Cu
|
63,546
|
|
30
|
Zinco |
Zn
|
65,38
|
|
31
|
Gallio |
Ga
|
69,72
|
|
32
|
Germanio |
Ge
|
72,59
|
|
33
|
Arsenico |
As
|
74,9216
|
|
34
|
Selenio |
Se
|
78,96
|
|
35
|
Bromo |
Br
|
79,904
|
|
36
|
Kripton |
Kr
|
83,80
|
|
37
|
Rubidio |
Rb
|
85,4678
|
|
38
|
Stronzio |
Sr
|
87,62
|
|
39
|
Ittrio |
Y
|
88,9059
|
|
40
|
Zirconio |
Zr
|
91,224
|
|
41
|
Niobio |
Nb
|
92,9064
|
|
42
|
Molibdeno |
Mo
|
95,94
|
|
43
|
Tecnezio |
Tc
|
(98)
|
|
44
|
Rutenio |
Ru
|
101,9055
|
|
45
|
Rodio |
Rh
|
102,9055
|
|
46
|
Palladio |
Pd
|
106,42
|
|
47
|
Argento |
Ag
|
107,868
|
|
|
|
N
|
Elemento
|
Simbolo
|
Peso atomico
|
|
48
|
Cadmio |
Cd
|
112,41
|
|
49
|
Indio |
In
|
114,82
|
|
50
|
Stagno |
Sn
|
118,71
|
|
51
|
Antimonio |
Sb
|
121,75
|
|
52
|
Tellurio |
Te
|
127,60
|
|
53
|
Iodio |
I
|
126,9045
|
|
54
|
Xenon |
Xe
|
131,29
|
|
55
|
Cesio |
Cs
|
132,9054
|
|
56
|
Bario |
Ba
|
137,33
|
|
57
|
Lantanio |
La
|
138,9055
|
|
58
|
Cerio |
Ce
|
140,12
|
|
59
|
Praseodimio |
Pr
|
140,9077
|
|
60
|
Neodimio |
Nd
|
144,24
|
|
61
|
Promezio |
Pm
|
(145)
|
|
62
|
Samario |
Sm
|
150,36
|
|
63
|
Europio |
Eu
|
151,96
|
|
64
|
Gadolinio |
Gd
|
157,25
|
|
65
|
Terbio |
Tb
|
158,9254
|
|
66
|
Disprosio |
Dy
|
162,50
|
|
67
|
Olmio |
Ho
|
164,9304
|
|
68
|
Erbio |
Er
|
167,26
|
|
69
|
Tulio |
Tm
|
168,9342
|
|
70
|
Itterbio |
Yb
|
173,04
|
|
71
|
Lutezio |
Lu
|
174,967
|
|
72
|
Afnio |
Hf
|
178,49
|
|
73
|
Tantalio |
Ta
|
180,9479
|
|
74
|
Tungsteno |
W
|
183,85
|
|
75
|
Renio |
Re
|
186,207
|
|
76
|
Osmio |
Os
|
190,2
|
|
77
|
Iridio |
Ir
|
192,22
|
|
78
|
Platino |
Pt
|
195,08
|
|
79
|
Oro |
Au
|
196,9665
|
|
80
|
Mercurio |
Hg
|
200,59
|
|
81
|
Tallio |
Tl
|
204,383
|
|
82
|
Piombo |
Pb
|
207,2
|
|
83
|
Bismuto |
Bi
|
208,9804
|
|
84
|
Polonio |
Po
|
(209)
|
|
85
|
Astato |
At
|
(210)
|
|
86
|
Radon |
Rn
|
(222)
|
|
87
|
Francio |
Fr
|
(223)
|
|
88
|
Radio |
Ra
|
226,0254
|
|
89
|
Attinio |
Ac
|
227,028
|
|
90
|
Torio |
Th
|
232,0381
|
|
91
|
Protoattinio |
Pa
|
231,0359
|
|
92
|
Uranio |
U
|
238,0289
|
|
93
|
Nettunio |
Np
|
237,0482
|
|
94
|
Plutonio |
Pu
|
(244)
|
|
