82. Polonium-218 is an alpha emitter with a half-life of 3.0 minutes. If a sample contains 55 mg of Po-218 (atomic mass- 218.008965 amu), how many alpha emissions occur in 25.0 minutes? If the polonium is ingested by a person, to what amount of radiation in Ci) is the person exposed?

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Jamar FerryLv2

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81. Bismuth-210 is a beta emitter with a half-life of 5.0 days. If a sample contains 1.2 g of Bi-210 (atomic mass = 209.984105 amu), how many beta emissions occur in 13.5 days? If a person's body intercepts 5.5% of those emissions, to what amount of radiation (in Ci) is the person exposed?

Bismuth-210 is beta emitter with a half-life of 5.0 days.

Part A:

If a sample contains 1.2 g of Bi-210 (atomic mass = 209.984105amu), how many beta emissions would occur in 13.0 days?

Express your answer using two significant figures

? beta decays

Part B:

If a person's body intercepts 5.8% of those emissions, to what doseof radiation (in Ci) is the person exposed?

Express your answer using two significant figures

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