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     Isotopes:
Isotope Half Life
Bi-202 1.7 hours
Bi-204 11.2 hours
Bi-205 15.3 days
Bi-206 6.24 days
Bi-207 32.0 years
Bi-208 368000.0 years
Bi-209 Stable
Bi-210 5.0 days
Bi-210m 3000000.0 years
Bi-211 2.1 minutes
Bi-212 1.0 hour
Bi-213 45.6 minutes
Bi-214 19.9 minutes
Bi-215 7.0 minutes
 

Radioisotopes:

(From WebElements)

Isotope Mass Half-Life
205Bi 204.97737 15.31 d
206Bi 205.97848 6.243 d
207Bi 206.97846 35 y
208Bi 207.97973 3.68 x 105 y
210Bi 209.98410 5.01 d
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Cary Academy Periodic Table