Atomic Weight of Elements in Periodic Table
- Practical Electron Microscopy and Database -
- An Online Book -

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Table 4981. Atomic weight of elements in periodic table.

1 2   3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
     
1 H
Hydrogen
1.0079
  2 He
Helium
4.0026
                 
3 Li
Lithium
6.941
4 Be
Beryllium
9.0122
Atomic weight: Grams per mole (g/mol)
5 B
Boron
10.811
6 C
Carbon
12.011
7 N
Nitrogen
14.007
8 O
Oxygen
15.999
9 F
Fluorine
18.998
10 Ne
Neon
20.18
                 
11 Na
Sodium
22.99
12 Mg
Magnesium
24.305
The atomic weights are in red.
13 Al
Aluminium
26.982
14 Si
Silicon
28.085
15 P
Phosphorus
30.974
16 S
Sulphur
32.065
17 Cl
Chlorine
35.453
18 Ar
Argon
39.948
                                     
19 K
Potassium
39.098
20 Ca
Calcium
40.078
  21 Sc
Scandium
44.956
22 Ti
Titanium
47.867
23 V
Vanadium
50.941
24 Cr
Chromium
51.996
25 Mn
Manganese
54.938
26 Fe
Iron
55.845
27 Co
Cobalt
58.933
28 Ni
Nickel
58.693
29 Cu
Copper
63.546
30 Zn
Zinc
65.38
31 Ga
Gallium
69.723
32 Ge
Germanium
72.64
33 As
Arsenic
74.922
34 Se
Selenium
78.96
35 Br
Bromine
79.904
36 Kr
Krypton
83.798
                                     
37 Rb
Rubidium
85.468
38 Sr
Strontium
87.62
  39 Y
Yttrium
88.906
40 Zr
Zirconium
91.224
41 Nb
Niobium
92.906
42 Mo
Molybdenum
95.96
43 Tc
Technetium
98
44 Ru
Ruthenium
101.07
45 Rh
Rhodium
102.91
46 Pd
Palladium
106.42
47 Ag
Silver
107.87
48 Cd
Cadmium
112.41
49 In
Indium
114.82
50 Sn
Tin
118.71
51 Sb
Antimony
121.76
52 Te
Tellurium
127.60
53 I
Iodine
126.9
54 Xe
Xenon
131.29
                                     
55 Cs
Cesium
132.91
56 Ba
Barium
137.33
{57-70}
Lanthanoid
71 Lu
Lutetium
174.97
72 Hf
Hafnium
178.49
73 Ta
Tantalum
180.95
74 W
Tungsten
183.84
75 Re
Rhenium
186.21
76 Os
Osmium
190.23
77 Ir
Iridium
192.22
78 Pt
Platinum
195.08
79 Au
Gold
196.97
80 Hg
Mercury
200.59
81 Tl
Thallium
204.38
82 Pb
Lead
207.2
83 Bi
Bismuth
208.98
84 Po
Polonium
209
85 At
Astatine
210
86 Rn
Radon
222
                         
87 Fr
Francium
223
88 Ra
Radium
226
[89-102]
Actinoid
103 Lr
Lawrencium
262
104 Rf

261
105 Db

262
106 Sg

266
107 Bh

264
108 Hs

277
109 Mt

268
110 Ds

271
111 Uuu

272
112 Uub

277
  114 Uuq




 
                               
{lanthanides} {57-70} 57 La
Lanthanum
138.91
58 Ce
Cerium
140.12
59 Pr
Praseodymium
140.91
60 Nd
Neodymium
144.24
61 Pm
Prometium
145
62 Sm
Samarium
150.36
63 Eu
Europium
151.96
64 Gd
Gadolinium
157.25
65 Tb
Terbium
158.93
66 Dy
Dysprosium
162.5
67 Ho
Holmium
164.93
68 Er
Erbium
167.26
69 Th
Thulium
168.93
70 Yb
Ytterbium
173.05
   
                           
{actinides} [89-102] 89 Ac
Actinium
227
90 Th
Thorium
232.04
91 Pa
Protactinium
231.04
92 U
Uranium
238.03
93 Np
Neptunium
237.05
94 Pu
Plutonium
244
95 Am
Americium
243
96 Cm
Curium
247
97 Bk
Berkelium
247
98 Cf
Californium
251
99 Es
Einsteinium
252
100 Fm
Fermium
257
101 Md
Mendelevium
258
102 No
Nobelium
259
   
 

 

 

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