Polonium-218 is an alpha emitter with a half-life of 30 minutes Part A If a sample contains 53 mg of Po-218 (atomic mass-218.008965 amu), how many alpha emissions would occur in 22.0 minutes? Express your answer using two significant figures. ΗΘΕΙ ΑΣΦΑ Submit Part B Bequest Answer If the polonium were ingested by a person, to what dose of radiation (in Ci) would the person be exposed? Express your answer using two significant figures. WEI ΑΣΦΑ 20 alpha decays ? CL

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