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)

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The Answer of 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)

Approximately How Many Radioactive Atoms Are Present in a Tritium