14. Iodine-131, a beta emitter, has a half-life of 8 days. A 2-gram sample of initially pure iodine-131 is stored for 32 days. How much iodine 131 remains in the sample afterward?

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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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radioisotope?
is 1,000 counts per
14. Iodine-131, a beta emitter, has a half-life of 8 days. A 2-gram sample
of initially pure iodine-131 is stored for 32 days. How much iodine-
131 remains in the sample afterward?
15. An accident in a laboratory results in a room being contaminated by
a radioisotope with a half-life of 3 days. If the radiation is measured
to be eight times the maximum permissible level, how much time
must elapse before the room is safe to enter?
16. The amount of carbon-14 in an ancient wooden bowl is found to be
one-half that in a new piece of wood. How old is the bowl?
17. When the plutonium bomb was tested in New Mexico in 1945,
approximately 1 gram of matter was converted into energy. How
many joules of energy were released by the explosion?
18. A nucleus of element 112 is formed using the reaction equation
given near the end of Section 11.7. It then undergoes six successive
alpha decays. Give the identity of the isotope that results after each
step of this process
19. A nucleus of elem
Transcribed Image Text:radioisotope? is 1,000 counts per 14. Iodine-131, a beta emitter, has a half-life of 8 days. A 2-gram sample of initially pure iodine-131 is stored for 32 days. How much iodine- 131 remains in the sample afterward? 15. An accident in a laboratory results in a room being contaminated by a radioisotope with a half-life of 3 days. If the radiation is measured to be eight times the maximum permissible level, how much time must elapse before the room is safe to enter? 16. The amount of carbon-14 in an ancient wooden bowl is found to be one-half that in a new piece of wood. How old is the bowl? 17. When the plutonium bomb was tested in New Mexico in 1945, approximately 1 gram of matter was converted into energy. How many joules of energy were released by the explosion? 18. A nucleus of element 112 is formed using the reaction equation given near the end of Section 11.7. It then undergoes six successive alpha decays. Give the identity of the isotope that results after each step of this process 19. A nucleus of elem
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