State polonium 218 is an alpha emitter with a half life of, Ask an Expert

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

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