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The Radiochemist, Will I

Question 59

Multiple Choice

The radiochemist, Will I. Glow, studied thorium-232 and found that 2.82 × 10-7 moles emitted 8.42 × 106 α particles in one year. What is the decay constant for thorium-232?


A) 3.35 × 10 -14 yr -1
B) 4.96 × 10 -11 yr -1
C) 1.40 × 10 10 yr -1
D) 2.99 × 10 13 yr -1
E) None of these choices are correct.

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