28
2 Summary Tables
2.5.3 Isotope Patterns of Naturally Occurring Elements
The mass of the most abundant isotope is given under the symbol of the element.
The lightest isotope is shown at the left end of the x axis.
H
1
He
4
Li
7
Be
9
B
11
C
12
N
14
O
16
F
19
Ne
20
Na
23
Mg
24
Al
27
Si
28
P
31
S
32
Cl
35
Ar
40
K
39
Ca
40
Sc
45
Ti
48
V
51
Cr
52
Mn
55
Fe
56
Co
59
Ni
58
Cu
63
Zn
64
Ga
69
Ge
74
As
75
Se
80
Br
79
Kr
84
Rb
85
Sr
88
Y
89
Zr
90
Nb
93
Mo
98
Ru
102
Rh
103
Pd
106
Ag
107
Cd
114
In
115
Sn
120
Sb
121
Te
130
I
127
Xe
132
Cs
133
Ba
138
La
139
Ce
140
Pr
141
Nd
142
Sm
152
Eu
153
Gd
158
Tb
159
Dy
164
Ho
165
Er
166
Tm
169
Yb
174
Lu
175
Hf
180
Ta
181
W
184
Re
187
Os
192
Ir
193
Pt
195
Au
197
Hg
202
Tl
205
Pb
208
Bi
209
Th
232
U
238