Periodensystem der Elemente
I II III A IV A V A VI A VII A VIII A VIII A VIII A I A II A III IV V VI VII VIII
1 1 H
Wasserstoff
1,00794
2 He
Helium
4,002602
2 3 Li
Lithium
6,941
4 Be
Beryllium
9,012182
Ordnungszahl (Protonen)
Atommasse mit * = radioaktiv
Sysmbolname
fest - flüssig - gasförmig - künstlich
Metall Halb-
metall
Nicht-
metall
5 B
Bor
10,811
6 C
Kohlenstoff
12,0107
7 N
Stickstoff
14,00674
8 O
Sauerstoff
15,9994
9 F
Fluor
18,9984032
10 Ne
Neon
20,1797
3 11 Na
Natrium
22,989770
12 Mg
Magnesium
24,3050
13 Al
Aluminium
26,981538
14 Si
Silicium
28,0855
15 P
Phosphor
30,973761
16 S
Schwefel
32,066
17 Cl
Chlor
35,4527
18 Ar
Argon
39,948
4 19 K
Kalium
39,0983
20 Ca
Calcium
39,0983
21 Sc
Scandium
44,955910
22 Ti
Titan
47,867
23 V
Vanadium
50,9415
24 Cr
Chrom
51,9961
25 Mn
Mangan
54,938049
26 Fe
Eisen
55,845
27 Co
Cobalt
58,9332
28 Ni
Nickel
58,6934
29 Cu
Kupfer
63,546
30 Zn
Zink
65,39
31 Ga
Gallium
69,723
32 Ge
Germanium
72,61
33 As
Arsen
74,92160
34 Se
Selen
78,96
35 Br
Brom
79,904
36 Kr
Krypton
83,80
5 37 Rb
Rubidium
85,4678
38 Sr
Strontium
87,62
39 Y
Yttrium
88,90585
40 Zr
Zirconium
91,224
41 Nb
Niob
92,90638
42 Mo
Molybdän
95,94
43 Tc
Technetium
98,9063*
44 Ru
Ruthenium
101,07
45 Rh
Rhodium
102,90550
46 Pd
Palladium
106,42
47 Ag
Silber
107,8682
48 Cd
Cadmium
112,411
49 In
Indium
114,818
50 Sn
Zinn
118,710
51 Sb
Antimon
121,760
52 Te
Tellur
127,60
53 I
Iod
126,90447
54 Xe
Xenon
131,29
6 55 Cs
Cäsium
132,90545
56 Ba
Barium
137,327
57-71 72 Hf
Hafnium
178,49
73 Ta
Tantal
180,9479
74 W
Wolfram
183,84
75 Re
Rhenium
186,207
76 Os
Osmium
190,23
77 Ir
Iridium
192,217
78 Pt
Platin
195,078
79 Au
Gold
197,96655
80 Hg
Quecksilber
200,59
81 Tl
Thallium
204,3833
82 Pb
Blei
207,2
83 Bi
Bismut
208,98038
84 Po
Polonium
208,9824*
85 At
Astat
209,9871*
86 Rn
Radon
222,0176*
7 87 Fr
Francium
223,0197*
88 Ra
Radium
226,0254*
89-103 104 Rf
Rutherfordium
261,10869*
105 Db
Dubnium
262,11376*
106 Sg
Seaborgium
263,1182*
107 Bh
Bohrium
264*
108 Hs
Hassium
269*
109 Mt
Meitnerium
268*
110 Uun
Ununnilium
273*
111 Uuu
Unununium
272*
112 Uub
Ununbium
277*
113 Uut

114 Uuq
Ununquadium
285*
115 Uup

116 Uuh
Ununhexium
289*
117 Uus

118 Uuo
Ununoctium
293*

6 57 La
Lanthan
138,9055
58 Ce
Cer
140,115
59 Pr
Praseodym
140,90765
60 Nd
Neodym
144,24
61 Pm
Prometheum
144,912743*
62 Sm
Samarium
150,36
63 Eu
Europium
151,965
64 Gd
Gadolinium
157,25
65 Tb
Terbium
158,92534
66 Dy
Dysprosium
162,50
67 Ho
Holmium
164,93032
68 Er
Erbium
167,26
69 Tm
Thulium
168,93421
70 Yb
Ytterbium
173,04
71 Lu
Lutetium
174,967
7 89 Ac
Actinium
227,02775*
90 Th
Thorium
232,0381*
91 Pa
Protactinium
231,035880*
92 U
Uran
238,0289*
93 Np
Neptunium
237,048167*
94 Pu
Plutonium
244,064199*
95 Am
Americium
243,061375*
96 Cm
Curium
247,070347*
97 Bk
Berkelium
247,070300*
98 Cf
Californium
251,079580*
99 Es
Einsteinium
252,082944*
100 Fm
Fermium
257,075099*
101 Md
Mendelevium
258,098570*
102 No
Nobelium
259,100931*
103 Lr
Lawrencium
262,11*

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