Common Activity Levels of Radon-222 Are in the Range of 1

question 51

Multiple Choice

Common activity levels of radon-222 are in the range of 1 picocurie/liter (pCi/L) at room temperature and pressure. How many atoms of radon decay each minute in a 1 L sample of gas with radiation at this level? Recall that 1 Bq = 1 decay/s and 1 Ci = 3.7 x10¹⁰ Bq.

• A) 6 x10^-4
• B) 6 x 10⁸
• C) 2 x 10¹²
• D) 2
• E) 4 x10^-2

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