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A Pure Sample of 226Ra Contains 3

Question 2

Multiple Choice

A pure sample of 226Ra contains 3.0 × 1014 atoms of the isotope.If the half-life of 226Ra = 1.6 × 103 years,what is the activity of this sample?


A) 13 × 1010 decays/yr
B) 9.4 × 1010 decays/yr
C) 6.7 × 109 decays/yr
D) 8.7 × 1010decays/yr

Correct Answer:

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