Here are some half-lives for different isotopes of bismuth (Bi):
Bi-211 — 2.1 minutes
Bi-212 — 60.6 minutes
Bi-213 — 45.7 minutes
Bi-214 — 19.9 minutes
If there are 200 grams of one isotope of bismuth, and after 60.6 minutes there are 100 grams of bismuth, what isotope is it?
4 answers
So the Bi has gone through 1 half life since it has decreased from 200 g to 100 g. And it did that in 60.6 minutes so the half life of the isotope must be 60.6 minutes. and that is .......?
no but these are my choices
A. Bi-212
B. Bi-211
C. Bi-213
D. Bi-214
A. Bi-212
B. Bi-211
C. Bi-213
D. Bi-214
WHICH ONE HAS A HALF-LIFE OF 60.6?
Answer anyone?