Exercice 2: Part I A radioactive nuclide A disintegrates into a stable nuclide B. The half-life of A is 6.0 days. If the initial number of nuclide A is 2x1020, calculate: 1. The decay constant 2. The number of remaining nuclide. 3. The number of nuclide B after 20 days.

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Exercice 2:
Part I
A radioactive nuclide A disintegrates into a stable nuclide B. The half-life of A is 6.0 days. If
the initial number of nuclide A is 2x1020, calculate:
1. The decay constant
2. The number of remaining nuclide.
3. The number of nuclide B after 20 days.
Part II
Phosphorus-32 is a beta emitter with a decay constant of 3,6x107 s'. For a particular
application, the phosphorus-32 emits 2.0x10" beta particles every second. Determine
a. The half-life of the phosphorus-32.
b. The mass of pure phosphorus-32 will give this decay rate.
(Given the Avogadro constant, NA =6.02 ´ 1023 mol"')
Transcribed Image Text:Exercice 2: Part I A radioactive nuclide A disintegrates into a stable nuclide B. The half-life of A is 6.0 days. If the initial number of nuclide A is 2x1020, calculate: 1. The decay constant 2. The number of remaining nuclide. 3. The number of nuclide B after 20 days. Part II Phosphorus-32 is a beta emitter with a decay constant of 3,6x107 s'. For a particular application, the phosphorus-32 emits 2.0x10" beta particles every second. Determine a. The half-life of the phosphorus-32. b. The mass of pure phosphorus-32 will give this decay rate. (Given the Avogadro constant, NA =6.02 ´ 1023 mol"')
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