Approximately How Many Radioactive Atoms Are Present in a Tritium

question 62

Multiple Choice

Approximately how many radioactive atoms are present in a tritium sample with an activity of 0.2 × 10−⁶ Ci and a half-life of 12.3 years? (1 Ci = 3.7 × 10¹⁰ decays/s)

• A) 1.3E+5
• B) 1.1E+2
• C) 3.5E-6
• D) 4.1E+12
• E) ​2.9E+12

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Catchall Category

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