A pure sample of 226Ra contains 3.0 × 1015 atoms of the isotope.If the half-life of 226Ra = 1.6 × 103 years,what is the activity of this sample?
A) 1.9E+12 decays/yr
B) 1.3E+12 decays/yr
C) 4.1E+4 decays/yr
D) 4.8E+18 decays/yr
E) 8.1E+8 decays/yr
Correct Answer:
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