Approximately how many radioactive atoms are present in a tritium sample with an activity of 0.6 × 10^-6 Ci and a half-life of 12.3 years? (1 Ci = 3.7 × 10^10 decays/s)
a. 4 × 10^10
c. 7 × 10^8
b. 2 × 10^8
d. 1 × 10^13
D
Physics & Space Science
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