1
H
1.008
                                                                                                                                
1 atomic mass [amu] 266
2
He
4.003
3
Li
6.941
4
Be
9.012
Atomic Mass 5
B
10.81
6
C
12.01
7
N
14.01
8
O
16
9
F
19
10
Ne
20.18
11
Na
22.99
12
Mg
24.31
1 amu = 1.66054×10-27 kg 13
Al
26.98
14
Si
28.09
15
P
30.97
16
S
32.07
17
Cl
35.45
18
Ar
39.95
19
K
39.1
20
Ca
40.08
21
Sc
44.96
22
Ti
47.88
23
V
50.94
24
Cr
52
25
Mn
54.94
26
Fe
55.85
27
Co
58.47
28
Ni
58.69
29
Cu
63.55
30
Zn
65.39
31
Ga
69.72
32
Ge
72.59
33
As
74.92
34
Se
78.96
35
Br
79.9
36
Kr
83.8
37
Rb
85.47
38
Sr
87.62
39
Y
88.91
40
Zr
91.22
41
Nb
92.91
42
Mo
95.94
43
Tc
98
44
Ru
101.1
45
Rh
102.9
46
Pd
106.4
47
Ag
107.9
48
Cd
112.4
49
In
114.8
50
Sn
118.7
51
Sb
121.8
52
Te
127.6
53
I
126.9
54
Xe
131.3
55
Cs
132.9
56
Ba
137.3
57
La
138.9
72
Hf
178.5
73
Ta
180.9
74
W
183.9
75
Re
186.2
76
Os
190.2
77
Ir
190.2
78
Pt
195.1
79
Au
197
80
Hg
200.5
81
Tl
204.4
82
Pb
207.2
83
Bi
209
84
Po
210
85
At
210
86
Rn
222
87
Fr
223
88
Ra
226
89
Ac
227
104
Rf
257
105
Db
260
106
Sg
263
107
Bh
262
108
Hs
265
109
Mt
266
 
58
Ce
140.1
59
Pr
140.9
60
Nd
144.2
61
Pm
147
62
Sm
150.4
63
Eu
152
64
Gd
157.3
65
Tb
158.9
66
Dy
162.5
67
Ho
164.9
68
Er
167.3
69
Tm
168.9
70
Yb
173
71
Lu
175
90
Th
232
91
Pa
231
92
U
238
93
Np
237
94
Pu
242
95
Am
243
96
Cm
247
97
Bk
247
98
Cf
249
99
Es
254
100
Fm
253
101
Md
256
102
No
254
103
Lr
257

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