| |
| |
Lista abreviada de
Isótopos |
|
| Numero atómico |
|
Símbolo |
|
Elemento |
|
Numero de masa |
|
Masa atómica |
|
Abundancia
porcentual o forma decaimiento si es radiactivo |
|
Vida Media (radiactivo) |
|
83 |
|
Bi |
|
Bismuto |
|
209 |
|
208.98039 |
|
100 |
|
|
|
|
|
|
|
|
211 |
|
210.98726 |
|
a, b-,
g |
|
2.15 min
|
|
|
|
|
|
|
214 |
|
213.998702 |
|
b-,a
|
|
19.7 min
|
|
84 |
|
Po |
|
Polonio |
|
210 |
|
209.98286 |
|
a, g
|
|
138.38
días |
|
|
|
|
|
|
214 |
|
213.99519 |
|
a, g
|
|
164
ms |
|
85 |
|
At |
|
Astatino |
|
218 |
|
218.0087 |
|
a,b- |
|
~2 s
|
|
86 |
|
Rn |
|
Radón |
|
222 |
|
222.017574 |
|
a, g
|
|
3.8235
días |
|
87 |
|
Fr |
|
Francio |
|
223 |
|
223.019734 |
|
a, b-,
g |
|
21.8 min
|
|
88 |
|
Ra |
|
Radio |
|
226 |
|
226.025406 |
|
a, g
|
|
1.60 X
103 años |
|
|
|
|
|
|
228 |
|
228.031069 |
|
b- |
|
5.76
años |
|
89 |
|
Ac |
|
Actinio |
|
227 |
|
227.027751 |
|
a, b-,
g |
|
21.773
años |
|
90 |
|
Th |
|
Torio |
|
228 |
|
228.02873 |
|
a, g
|
|
1.9131
años |
|
|
|
|
|
|
232 |
|
232.038054 |
|
100, a, g |
|
1.41 X
1010 años |
|
91 |
|
Pa |
|
Protactinio |
|
231 |
|
231.035881 |
|
a, g
|
|
3.28 X
104 años |
|
92 |
|
U |
|
Uranio |
|
232 |
|
232.03714 |
|
a, g
|
|
72 años
|
|
|
|
|
|
|
233 |
|
233.039629 |
|
a, g
|
|
1.592 X
105 años |
|
|
|
|
|
|
235 |
|
235.043925 |
|
0.72; a, g
|
|
7.038 X
108 años |
|
|
|
|
|
|
236 |
|
236.045563 |
|
a, g
|
|
2.342 X
107 años |
|
|
|
|
|
|
238 |
|
238.050786 |
|
99.275; a, g |
|
4.468 X
109 años |
|
|
|
|
|
|
239 |
|
239.054291 |
|
b-,
g |
|
23.5 min
|
Datos Tomados de Chart of the Nuclides 12a. ed., 1977, y de C. M.
Lederer y V. S. Shiley, eds., Table of Isotopes, 7a. ed. John Wiley & Sons , inc.,
Nueva York, 1978 |
|
|
|
