(a) What is the activity, in millicuries, of a 0.500-g sample of ? (This isotope decays by...
(a) What is the activity, in millicuries, of a 0.500-g sample of 
? (This isotope decays by α-particle emission and has a half-life of 2.20 × 106 years.)
(b) Write a balanced nuclear equation for the decay of 
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Solutions For Problems in Chapter 20
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